Einstein Telescope to detect tidal resonances in binary neutron stars

A new Bayesian study has explored the Einstein Telescope's (ET) capability to detect tidal resonances in binary neutron star systems. As these stars spiral inward, the increasing tidal frequency resonantly excites vibrational modes within them. These oscillations act as seismological probes of the stars' complex internal structure, offering a pathway for gravitational-wave asteroseismology. The researchers simulated one year of ET observations, analyzing the 200 strongest signals. Their findings indicate that the Einstein Telescope will be able to identify these resonant modes, being sensitive to gravitational-wave phase shifts as small as ΔΦ ≈ 0.03 for favorable events. This level of precision would allow for discerning the subtle imprints that tidal resonances leave on the gravitational-wave signal. The study also highlights that ignoring these resonances can introduce significant biases in determining the tidal deformabilities of neutron stars, a crucial parameter for understanding the equation of state of ultradense matter. These results solidify tidal resonances as a measurable asteroseismological tool with the next generation of gravitational-wave detectors, opening new windows into the study of stellar interiors and nuclear physics under extreme conditions.

Modeling Neutron Stars in f(Q) Gravity with Krori-Barua Metric

A recent study has explored the behavior of compact objects, such as neutron stars, under the framework of modified f(Q) gravity. This theory introduces a gravitational interaction mediated by non-metricity Q, deviating from Einstein's General Relativity. The researchers employed an anisotropic equation of state and assumed a linear f(Q) function with respect to Q, utilizing the Krori-Barua metric to solve the field equations. The primary objective was to determine how this modification of gravity affects the properties of neutron stars. The analysis focused on four specific pulsars: LMC X-4, SMC X-4, Cen X-3, and Vela X-1. For each, the anisotropy factor was calculated, finding that this component is positive and increases monotonically, suggesting that nuclear forces can counteract gravitational attraction in these objects. Furthermore, the mass-radius relationship was investigated, and it was confirmed that the compactness of these pulsars remains within the Buchdahl limit for various values of the metric parameter 'a'. This reinforces the interpretation that these pulsars could be neutron stars in a modified f(Q) gravity environment. The authors also calculated the model's mass and performed a Chi-Squared test using thirty different values of 'a' to compare observed masses with those predicted by the model. Additionally, the evolution of the surface redshift was examined, as well as whether the compact objects described in the model maintain their compact nature. These results provide a new perspective on the internal structure and stability of neutron stars in alternative theories of gravity, opening avenues for future observations that could discriminate between gravitational models.

NASA Awards University Innovations for Lunar and Martian Exploration

NASA has announced the winners of the 2026 Revolutionary Aerospace Systems Concepts – Academic Linkage (RASC-AL) competition, a contest that challenges university students to develop innovative concepts and prototypes to overcome technological limitations in space exploration. First prize was awarded to the Massachusetts Institute of Technology (MIT) for its project "Exploration-Class Lunar Integrated Power SystEm," a proposal focused on integrated power systems for lunar missions. This recognition underscores the importance of academic collaboration in advancing space exploration capabilities. Another MIT team secured second place with their project "Mars Exploration Layered Infrastructure for Operations, Research, and Advancement," which addresses the infrastructure needed for operations, research, and development on Mars. Third place went to Virginia Polytechnic Institute and State University for their concept for Martian exploration. These projects demonstrate the creativity and engineering rigor of the new generations in the search for solutions to NASA's future challenges. Although specific technical details of each proposal have not been extensively disclosed in this initial announcement, the RASC-AL competition focuses on the feasibility and disruptive potential of the ideas. Award-winning projects often lay the groundwork for future research and development in critical areas such as energy autonomy in extraterrestrial environments and the creation of sustainable infrastructure for long-duration missions on other planets. NASA uses this initiative to identify emerging talent and nurture concepts that could be integrated into its medium- and long-term exploration roadmaps.

Webb reveals young stars in all stages of formation

The James Webb Space Telescope (JWST) has captured unprecedented images of young stars in various phases of their development, from initial formation in dense clouds of gas and dust to more advanced stages. These observations, made with its infrared capability, allow astronomers to penetrate the cosmic clouds that obscure these processes, offering a detailed view of how stars are born and evolve. This breakthrough is crucial for understanding the mechanisms of star formation, a fundamental process in astrophysics. Webb's images provide data on the properties of protoplanetary disks, ejected material jets, and the interactions between forming stars and their environment. This helps refine theoretical models of stellar evolution and planetary system formation. The JWST's ability to observe in the mid and near-infrared is key to these types of studies, as visible light is absorbed by interstellar dust. By detecting the infrared radiation emitted by young stars and surrounding material, Webb can reveal details that were inaccessible to previous telescopes. These new observations promise to unveil unknown aspects of the first moments of stellar life and the genesis of planets.

New SKA Director: Jessica Dempsey Takes Project Leadership

Jessica Dempsey has been appointed the new Director of the Square Kilometre Array (SKA), one of the most ambitious and large-scale radio astronomy projects ever conceived. The SKA, an international collaboration, aims to build the world's largest radio telescope, with the goal of unraveling fundamental mysteries of the universe, such as the formation of the first stars and galaxies, the nature of dark energy, and the search for extraterrestrial life. Dempsey's appointment marks a significant milestone in the construction and development phase of this next-generation observatory. The SKA project is being built in two main locations: in Australia, with SKA-Low operating at low frequencies to detect signals from the early universe, and in South Africa, with SKA-Mid exploring a range of mid-frequencies. The combined infrastructure will utilize thousands of dish antennas and millions of dipole antennas, generating massive volumes of data that will require unprecedented supercomputing capabilities for processing and analysis. This global effort involves multiple countries and thousands of scientists and engineers. Dempsey's experience in large astronomical projects and her leadership will be crucial in guiding the SKA through its complex phases of construction, integration, and commissioning. The SKA promises to revolutionize our understanding of the cosmos, offering unprecedented sensitivity and resolution that will allow astronomers to observe the universe in detail never before possible. Her direction will be fundamental to ensuring that the SKA fulfills its promise of opening a new window to the universe.

Gravitational Waves and Gravitational Lensing Combined to Measure H0

A new study has employed a combination of gravitational wave standard sirens and time-delay gravitational lensing data to obtain a measurement of the Hubble parameter, H0, independent of the cosmological model. The goal is to address the persistent Hubble tension, a significant discrepancy between H0 measurements in the early universe (such as those from Planck) and in the late universe (such as those from the SH0ES project). Since both approaches rely on model-dependent assumptions or multi-step calibration chains, a determination of H0 that does not depend on a specific cosmological model is crucial for resolving this divergence. The researchers combined 142 gravitational wave standard siren events from the Fourth Gravitational-Wave Transient Catalog (GWTC-4) with the latest time-delay strong gravitational lensing data from TDCOSMO2025. Using a cosmological model-independent framework based on the distance sum rule, they obtained a value of H0 = 83.78 +12.53 -10.23 km s -1 Mpc -1, with a relative precision of 13.58%. This measurement was obtained under the FullPop-4.0 population model and the TDCOSMO2025-only lensing configuration. The study also reveals that the precision of H0 is strongly influenced by the treatment of the mass sheet transformation on the strong lensing side. By replacing the conservative hierarchical framework of TDCOSMO2025 with the H0LiCOW method, the constraint was tightened to H0 = 75.42 +3.74 -4.66 km s -1 Mpc -1, with a relative precision of 5.57%. At current precision, all results are consistent with both Planck and SH0ES values. Future improvements, such as more high-redshift dark siren events and a larger number of time-delay lensing systems, are expected to further strengthen this model-independent approach.

Earth Lit by the Moon, a New Perspective From Artemis II

A photograph captured by an astronaut on the Artemis II mission, en route to the Moon, has offered an unprecedented perspective of our planet. The image, taken from a considerable distance, shows Earth illuminated by sunlight reflected off the lunar surface, a phenomenon rarely observed from this particular orientation and distance. Although detailed information about the technical context of the capture is limited, the photograph highlights Earth's uniqueness as a celestial body in vast space. Such images not only have aesthetic value but also contribute to public understanding of space missions and our planet's position in the solar system. The Artemis II mission, whose primary objective is a crewed lunar flyby to test the Orion spacecraft's systems, provides a unique platform for these types of observations. These images, while not the primary scientific goal of the mission, offer a valuable opportunity to visualize Earth from a perspective few humans have experienced, reinforcing the connection between space exploration and the appreciation of our planetary home.

Modeling Cosmological Tracers in Modified Gravity with HEFT

Modern cosmology relies on the analysis of large galaxy surveys to understand the large-scale structure of the universe. A crucial aspect is the modeling of the power spectrum of biased tracers (galaxies), which do not perfectly reflect the distribution of dark matter. For decades, perturbative templates have been developed in Eulerian and Lagrangian frameworks for the standard cosmological model $\Lambda$CDM. However, to go beyond $\Lambda$CDM and explore modified gravity theories, more sophisticated tools are required that can accurately handle nonlinear regimes. This work addresses the implementation of the biased perturbative expansion, within the local Lagrangian bias scheme, in the framework of the Hybrid Effective Field Theory (HEFT). HEFT combines perturbation theory with dark matter simulations to model the nonlinear regime. The researchers focused on $f(R)$ gravity, a modified gravity theory that exhibits scale-dependent growth and a "chameleon screening" effect, making it a particularly challenging scenario for Lagrangian perturbation theory calculations and for generating accurate numerical simulations. The authors present a detailed description of the elements necessary to analytically calculate biased power spectra with loop corrections. These analytical predictions are compared with the results of fully non-perturbative simulations, validating the approach. Finally, they propose a strategy to extend existing HEFT-based emulators for $\Lambda$CDM, such as \texttt{bacco} and \texttt{Aemulus}, to cosmologies beyond the standard model, opening the door to a more robust analysis of data from future galaxy surveys in the context of modified gravity theories.

Hawking Radiation in Einstein-Euler-Heisenberg-de Sitter Black Holes

Researchers have calculated the greybody factors and Hawking radiation spectra for a specific class of black holes with a positive cosmological constant, known as Einstein-Euler-Heisenberg-de Sitter black holes. This study focuses on the emission of neutral scalar particles and massless Dirac fermions from these objects, considering the finite region between the black hole event horizon and the cosmological horizon as a two-sided scattering problem. Calculations were performed using direct numerical integrations for the transmission coefficients and a sixth-order WKB approximation to verify the results near the maximum of the potential barrier. The results show that, across the studied black hole family, an increase in the Euler-Heisenberg coupling raises the dominant barriers for scalar and Dirac particles, shifting the semi-transmission frequencies to higher values. Conversely, while keeping the charge and nonlinear coupling fixed, an increase in the cosmological constant contracts the static region and decreases the dominant greybody factor thresholds. These findings are crucial for understanding how the intrinsic properties of black holes and the cosmological environment influence radiation emission. A key aspect of the study is the dependence of Hawking radiation luminosity on the temperature prescription used. Prescriptions based on the event horizon temperature predict an increase in emission as the nonlinear correction grows, whereas effective temperatures of the static region result in much lower emission rates and can even reverse the trend. This underscores that the interpretation of black hole evaporation is not unique and requires an explicit specification of the temperature convention to avoid ambiguities in understanding these astrophysical and theoretical phenomena.

Hubble Observes Active Spiral Galaxy Messier 88

The NASA/ESA Hubble Space Telescope has captured a detailed image of Messier 88 (M88), also known as NGC 4501. This active spiral galaxy is located approximately 63 million light-years from Earth, in the constellation Coma Berenices. M88 is part of the Virgo Cluster, a vast grouping of galaxies that exerts considerable gravitational pull on surrounding galaxies, including the Local Group to which our Milky Way belongs. The designation "active galaxy" for M88 indicates that its center harbors a supermassive black hole that is actively feeding. This process of matter accretion generates intense radiation emission across various wavelengths, making it an object of great interest for studying active galactic nuclei (AGN) and their influence on galaxy evolution. The Hubble image provides a sharp view of its spiral structure, with well-defined arms where stars are forming. M88 is immersed in a gravitational journey of hundreds of millions of years within the Virgo Cluster. This movement through the intergalactic medium, as well as interactions with other galaxies in the cluster, can influence its morphology and star formation rate. Studying galaxies like M88 in cluster environments is crucial for understanding how gravity and environmental interactions shape the evolution of galactic structures over cosmic time.

NASA discovers how Earth may have received essential elements for life

Scientists backed by NASA have presented new data on how early Earth may have acquired some of the elements necessary for the planet to become habitable. The study, published in Science Advances, suggests a crucial role for Jupiter in distributing these elements throughout the young solar system. This research sheds light on the complex processes that shaped our planet's chemical composition in its initial stages, laying the groundwork for the emergence of life. Traditionally, it has been proposed that volatile elements, such as carbon, nitrogen, and water, arrived on Earth via asteroids and comets. However, this new work suggests that Jupiter's early migration may have significantly influenced the trajectory of these celestial bodies, directing them towards the inner solar system and, ultimately, towards Earth. This mechanism would offer a more complete explanation for the abundance of these elements on our planet, which are fundamental for the formation of organic molecules and the development of ecosystems. The study is based on a detailed analysis of the isotopic composition of certain terrestrial rocks and meteorites, which allows for the reconstruction of conditions in the early solar system. The results suggest that Jupiter, as it moved through the protoplanetary disk, acted as a "gravitational shepherd," altering the orbits of planetesimals and facilitating the delivery of volatile-rich materials to Earth. This deeper understanding of early planetary dynamics is vital for refining our models of habitable planet formation, not only in our solar system but also in other exoplanetary systems.

Jessica Dempsey takes the helm at SKA Observatory

Jessica Dempsey has been appointed as the new Director-General of the Square Kilometre Array Observatory (SKAO), the world's largest and most sensitive radio telescope project. This appointment marks a milestone in the construction and future operation of a global scientific infrastructure that promises to revolutionize our understanding of the universe. The SKAO is designed to explore the cosmos with unprecedented sensitivity and resolution, allowing astronomers to study phenomena such as the formation of the first stars and galaxies, the nature of dark matter and dark energy, and the search for extraterrestrial life. With sites in Australia and South Africa, the observatory will combine thousands of antennas to create a collecting area equivalent to one square kilometer. Dempsey's experience in large astronomical projects will be crucial in guiding the SKAO through its construction and commissioning phases, ensuring that the observatory reaches its full scientific potential. The SKAO is expected to begin its initial scientific operations later this decade, opening a new window to the radio-frequency universe.

Atmospheric gravity waves observed over Super Typhoon Sinlaku

Satellites have detected remarkable atmospheric phenomena in the upper layers of the atmosphere, generated by an intensifying tropical cyclone. These observations were made over Super Typhoon Sinlaku, revealing the capacity of extreme weather events on the Earth's surface to significantly influence the mesosphere and thermosphere. The study focused on gravity waves, perturbations in atmospheric density and pressure that propagate vertically. Although common in the atmosphere, their generation by typhoons and their propagation to such high altitudes, where they can interact with other atmospheric dynamics, are of particular interest for understanding the coupling between different atmospheric layers. Satellite images captured distinctive patterns in the upper atmosphere, indicative of these gravity waves. The intensity of Super Typhoon Sinlaku provided an energetic source for the formation of these waves, allowing their detection at high altitudes. This type of phenomenon is crucial for the transport of energy and momentum between atmospheric layers, affecting global circulation and the composition of the upper atmosphere.

Westerlund 2: X-rays and JWST Reveal Stellar Cradle

The Chandra X-ray Observatory and the James Webb Space Telescope (JWST) have combined their capabilities to offer a detailed image of the Westerlund 2 star cluster. This new observation, published on March 19, 2026, integrates X-ray data from Chandra (shown in pink) with infrared data from JWST (in shades of red, orange, green, cyan, and blue). The combination reveals a dense field of young stars, with estimated ages between one and three million years, highlighting the star formation activity in this region. The composite image allows astronomers to study the different phases of star formation and the impact of massive stars on their environment. Chandra's X-ray data are crucial for identifying young, active stars that emit at these wavelengths, while JWST's infrared capability penetrates dust and gas to reveal embedded stars and cooler gas and dust structures that are stellar nurseries. This synergy is fundamental to understanding how massive star clusters develop and disperse their material into the galaxy. Observations of Westerlund 2 are of particular interest due to the presence of some of the most massive and luminous stars known. The study of this cluster provides valuable information on the physical processes governing early stellar evolution and the dynamics of star clusters. The combination of data from different wavelengths is a standard strategy in astrophysics, but the quality and detail provided by the new generation of telescopes like JWST, along with Chandra's sensitivity, open new avenues for unraveling the complex mechanisms of star formation in extreme environments.

New Non-Gaussianity Predictions for Inflation with Vector Fields

Researchers have revisited the bispectrum resulting from cosmic inflation when kinetically coupled vector fields are incorporated. This work is crucial for understanding the imprints that an inflationary universe, driven by non-scalar fields, could leave on the cosmic microwave background (CMB). Inflation, the period of exponential expansion of the early universe, is the dominant explanation for the homogeneity, isotropy, and flatness of the cosmos, as well as for the origin of primordial density fluctuations that seeded galaxies. However, the exact nature of the inflationary field (inflaton) remains a mystery, and models including vector fields offer interesting alternatives to standard scalar models. The study focused on organizing the dynamics in terms of a parameter $h$, which quantifies the contribution of the vector field's kinetic energy relative to that of the scalar field. The bispectrum was evaluated in the strong vector field regime ($h \gg 1$), and a low-energy effective field theory (EFT) was developed for this regime. In this scenario, the entropic perturbation becomes heavy and can be integrated out, while the remaining curvature mode exhibits an imaginary sound speed and undergoes transient growth before crossing the horizon. This contrasts with the $h \ll 1$ regime, where the transfer from the vector sector persists out of the horizon and produces an enhanced local-type contribution scaling as $h^2N_K^3$. The results reveal that, in addition to the already known enhanced flattened signals scaling as $h^3$, there are new enhanced flattened signals scaling as $h^2$, and a sharp local projection scaling as $h$. The competition between these contributions leads to a signal dominated by the local component for intermediate values of $h$, and a signal dominated by the flattened component for larger values of $h$. These non-Gaussianity predictions in the bispectrum are important because they would allow distinguishing inflationary dynamics supported by vector fields, even in an exactly isotropic background. The detection of such patterns in the CMB would be strong evidence for these alternative models of inflation.

New Gravitational Wave Model Improves Orbital Eccentricity Detection

A new waveform model, SEOBNRv6EHM, has been developed to more accurately analyze gravitational waves from eccentric compact binaries. Orbital eccentricity is a key indicator of the formation channels and astrophysical environments of these systems, making its correct inference crucial. This advancement overcomes the limitations of previous models such as SEOBNRv5EHM and TEOBResumS-Dalí, which showed biases in estimating eccentricity, masses, and spins in complex configurations. The research team applied SEOBNRv6EHM to 26 gravitational wave events detected by the LIGO-Virgo-KAGRA collaboration during their O1-O4 observing runs, including binary black hole mergers, neutron star-black hole systems, and binary neutron stars. They identified five events with moderate support for eccentricity over the quasi-circular precessing spin hypothesis, with Bayes factors $\log_{10} \mathcal{B}^{\text{EAS}}_{\text{QCP}} > 0.5$. Furthermore, the model is applicable to generic planar binaries, allowing for the re-analysis of five high-mass events under the consideration of unbound initial conditions. For three of these events, including GW190521 (previously suggested as a dynamical capture), a direct capture configuration was found to be comparable or marginally favored over the eccentric aligned-spin and quasi-circular precessing-spin hypotheses, with Bayes factors $\log_{10}\mathcal{B}^{\rm unbound}_{\rm QCP} \approx 0.2-0.6$ for GW190521. However, the recovered configurations are not astrophysically realistic and cannot be confidently distinguished from highly eccentric bound orbits, thus these results do not confirm an unbound origin. SEOBNRv6EHM is approximately three times faster in parameter estimation analyses than its predecessor, SEOBNRv5EHM, while also improving waveform accuracy, facilitating efficient and large-scale inferences with eccentric waveforms.

New model simulates gravitational waves from eccentric binary black holes

Researchers have developed SEOBNRv6EHM, a new gravitational wave model that accurately simulates the emission from binary black hole (BBH) systems in generic planar orbits. This model is crucial for gravitational wave astronomy, as it allows for the inference of compact binary parameters, including orbital eccentricity, a key indicator of dynamic formation channels. Eccentricity is a fundamental parameter that, if not accounted for, can introduce systematic errors in gravitational wave analyses. The SEOBNRv6EHM model is based on the Effective-One-Body (EOB) formalism and has been calibrated using numerical relativity (NR) simulations from the SXS collaboration for quasi-circular orbits. In addition to the dominant (2,2) mode, the model includes multipoles such as (2,1), (3,3), (3,2), (4,4), and (4,3), covering the complete inspiral, merger, and ringdown process of coalescing binaries, as well as dynamic captures and scattering encounters. The novelty lies in the application of new resummations of the radiation reaction force and wave modes. The accuracy of SEOBNRv6EHM has been validated through extensive comparisons with 592 NR simulations of quasi-circular systems, 319 of eccentric systems, one dynamic capture, and two scattering events from SXS. For highly eccentric systems, the model achieves unprecedented accuracy, with waveform mismatches below or close to 2% across a total mass range of 20 to 200 M☉ and eccentricities up to ~0.9 in the 14 periastron passages prior to merger. Furthermore, SEOBNRv6EHM is significantly faster, generating waveforms 2 to 6 times faster than other advanced eccentric EOB models, making it ideal for applications in gravitational wave astronomy.

Hubble Captures Dwarf Irregular Galaxy ESO 490-017

The Hubble Space Telescope has captured a detailed image of the dwarf irregular galaxy ESO 490-017. This galaxy, with an approximate diameter of 12,000 light-years, is located about 23 million light-years from Earth in the constellation Canis Major. Its low surface brightness makes it a faint and diffuse object, appearing as a scattered stellar swarm in the background, behind brighter foreground stars distinguished by their characteristic diffraction spikes. Dwarf irregular galaxies like ESO 490-017 are objects of great interest to astrophysicists, as they are believed to represent one of the most primitive forms of galaxies in the universe. Their unstructured morphology, lacking a defined spiral or elliptical shape, suggests that they have experienced significant gravitational interactions or that their formation has not followed the patterns of more massive galaxies. The study of these galaxies provides crucial clues about the processes of galactic formation and evolution in low-density, low-metallicity environments. Hubble's ability to resolve low surface brightness objects is fundamental for observing galaxies like ESO 490-017. These observations allow scientists to analyze the stellar distribution, composition, and internal dynamics of these galaxies, contributing to a more complete understanding of the morphological and evolutionary diversity of galaxies in the cosmos. The image not only highlights the beauty of these distant objects but also underscores Hubble's ongoing role in expanding our astronomical knowledge.

Roman Space Telescope's main mirror passes final inspection

Engineers at NASA's Goddard Space Flight Center in Greenbelt, Maryland, have completed the final inspection of the Nancy Grace Roman Space Telescope's primary mirror. This crucial component, with a diameter of 2.4 meters, will be responsible for collecting and focusing light from cosmic objects, allowing Roman to capture wide panoramas of the universe. This milestone represents a fundamental step in the assembly of the observatory, which is expected to revolutionize our understanding of dark energy, dark matter, and exoplanet formation. Roman's primary mirror is a high-precision optical element, designed to operate in a vacuum and at cryogenic temperatures. Its manufacturing and polishing have required advanced techniques to ensure a nearly perfect surface, essential for obtaining sharp and detailed images. The completion of this inspection confirms that the mirror meets the strict performance specifications required for the mission's ambitious scientific goals. The quality of this mirror is comparable to that of the Hubble Space Telescope, but with a field of view 100 times larger, which will allow for much more efficient mapping of vast regions of the sky. The successful completion of this inspection paves the way for the integration of the mirror into the rest of the telescope's structure. Once assembled and launched, the Roman Telescope will conduct large-scale surveys to study the expansion of the universe, search for exoplanets using gravitational microlensing, and characterize the atmospheres of distant worlds. Data collected by Roman is expected to complement and expand on findings from other missions such as the James Webb Space Telescope, providing an unprecedented view of the structure and evolution of the cosmos.

Journey to the Heart of a Galaxy Cluster

The European Space Agency (ESA) has released an image simulating a fly-through to the center of a galaxy cluster. This visualization, based on real data from telescopes such as Hubble and Chandra, offers a unique perspective on the distribution of dark matter and hot gas in these massive cosmic structures. Although the image is an artistic representation, it draws on astronomical observations to illustrate the complexity and scale of galaxy clusters, which are the largest structures in the universe held together by gravity. Galaxy clusters are characterized by containing hundreds or even thousands of galaxies, vast quantities of extremely hot intergalactic gas that emits X-rays, and a dominant fraction of dark matter. Dark matter, which does not interact with light, is only detected through its gravitational effects and constitutes most of a cluster's mass. The hot gas, meanwhile, can reach temperatures of millions of Kelvin and is a crucial component for understanding the dynamics and evolution of these structures. This visual simulation not only serves as an outreach tool but also underscores the importance of combining data from different wavelengths (optical, X-ray) to reconstruct a complete picture of the cosmos. The ability to virtually "travel" through these structures allows scientists and the public to better appreciate the intricate interaction between visible and invisible matter, and how gravity shapes the universe on its largest scales. These visualizations are fundamental for astrophysics research and education, offering new ways to explore the complex data obtained by space observatories.

Gravitational waves from binary black holes could reveal dark matter

Scientists have proposed a new model that would allow for the detection of dark matter from gravitational waves emitted by merging black holes. This approach suggests that the characteristics of these waves, detectable by observatories such as LIGO and Virgo, could contain distinctive "fingerprints" of the interaction between black holes and the surrounding dark matter. Dark matter, which constitutes approximately 27% of the universe, does not interact with light or other forms of electromagnetic radiation, making it extremely difficult to detect directly. Therefore, its study relies primarily on its gravitational effects. The model focuses on how dark matter could alter the orbital dynamics of black holes before their merger. If black holes are immersed in a dense halo of dark matter, it could exert a frictional force on them, subtly modifying the phase and amplitude of the emitted gravitational waves. These modifications would be small but, in principle, detectable with current and future detector sensitivity. The proposal opens a new window for the search for dark matter, complementing traditional methods based on direct particle detection or the observation of large-scale gravitational effects in galaxies and clusters. The ability to discern these small perturbations in gravitational wave signals will require very precise data analysis and comparison with detailed theoretical models of black hole mergers in the absence of dark matter. If such signatures were detected, it would not only confirm the existence of dark matter but also provide crucial information about its properties, such as its local density and its interaction with gravity in extreme environments. This method could offer a unique perspective on the nature of one of the greatest unknowns in modern physics.

NASA Advances Development of Crewed Lunar Vehicles and Cargo Landers

NASA has announced the awarding of new contracts for the development of lunar vehicles capable of transporting crew and uncrewed cargo landers. This advancement is part of the Lunar Base program, which seeks to establish a long-term sustainable presence on the Moon. The initiative is crucial for future Artemis missions, which aim to return humans to the lunar surface and lay the groundwork for Mars exploration. The Lunar Base program not only focuses on transportation but also encompasses the development of infrastructure and technologies necessary for living and working in the lunar environment. This includes life support systems, power generation, communications, and in-situ resource utilization. The ability to efficiently send cargo and safely transport astronauts is fundamental for the construction and operation of a permanent lunar base. These contracts represent a significant step in NASA's strategy for space exploration. By involving private industry in the development of these capabilities, the agency seeks to accelerate progress and foster innovation, while optimizing costs. The goal is to establish a sustainable lunar economy and expand human presence beyond low Earth orbit, with the Moon serving as a stepping stone for future solar system exploration missions.

Webb reveals massive black hole predating its host galaxy

The James Webb Space Telescope (JWST) has provided new observations of Abell2744-QSO1, a distant galaxy more than 13 billion light-years away. Researchers have used Webb's imaging and spectroscopic capabilities to analyze the motion and composition of gas orbiting a supermassive black hole at the center of this galaxy. The results suggest that this black hole, with a mass of 50 million solar masses, formed before its host galaxy, challenging conventional theories about the co-evolution of black holes and galaxies. This discovery is significant because most current cosmological models postulate that supermassive black holes grow in concert with their galaxies, accumulating mass through gas accretion and mergers with other black holes. The hypothesis that this black hole was already immense from the beginning, possibly forming in the first second after the Big Bang, opens new avenues for understanding the early formation of structures in the universe. This implies that the growth mechanisms of black holes in the early universe could be much more efficient or different than previously thought. JWST observations, thanks to its infrared sensitivity and spectroscopic capability, have allowed for precise mapping of the black hole's environment. Analysis of the surrounding gas provides crucial information about its dynamics and composition, which in turn allows for inference of the central black hole's mass and its growth history. This finding drives research into primordial black holes and their role in the formation of the first galaxies, suggesting that some of these objects could have acted as massive "seeds" for galactic development.

NASA Initiates Bidding Process for Landsat 10 Satellite

NASA has released the draft Request for Proposal (DRFP) for the construction of the Landsat 10 spacecraft. This document marks the formal beginning of the acquisition process for the next satellite in the Landsat series, a joint mission between NASA and the U.S. Geological Survey (USGS) dedicated to continuous Earth observation. The DRFP, available for review via the SAM.gov platform, invites the aerospace industry to submit technical and economic proposals for the design, development, manufacturing, integration, and testing of the satellite. The Landsat series, initiated in 1972, constitutes the longest and most complete record of the Earth's surface from space. Its data are fundamental for monitoring environmental changes, managing natural resources, agriculture, mapping, and climate research. Landsat 10 will continue this work, ensuring the continuity of high-resolution remote sensing data collection that is essential for understanding the dynamics of our planet and its ecosystems. The release of this draft allows potential contractors to familiarize themselves with the mission's technical and operational requirements, as well as to submit questions and comments before the issuance of the definitive Request for Proposal. This procedure is crucial to ensure that the bidding process is transparent and competitive, and that NASA receives the best offers for a satellite expected to operate for at least five years in orbit, continuing the legacy of its predecessors.

NASA announces new contracts for lunar rovers and landers

NASA has announced new contracts for the development of crewed lunar rovers and uncrewed cargo landers, intended for future missions to the Moon. This announcement, made at a Lunar Base event at the agency's headquarters in Washington, underscores NASA's commitment to the Artemis program, which seeks to establish a sustainable human presence on our natural satellite. The rovers will allow crews to explore the lunar surface with greater mobility, while the cargo landers will be crucial for transporting essential equipment and supplies. In addition to the new contracts, NASA leaders have shared projected launch timelines and key milestones for the first infrastructure and exploration missions to the lunar South Pole. This region is of particular interest due to the potential presence of water ice in permanently shadowed craters, a vital resource for future lunar bases. The plan includes the deployment of fundamental elements for a lunar base, which will lay the groundwork for extended stays and deeper scientific research. These advancements represent concrete steps toward realizing NASA's vision for lunar exploration. The combination of crewed rovers and robust cargo capabilities is fundamental to addressing the logistical and operational challenges of establishing a lunar base. The space agency seeks not only to send humans back to the Moon but also to create an infrastructure that enables sustainable exploration and utilization of its resources, opening new avenues for scientific research and preparation for future missions to Mars.

Webb Observes Star Clusters in Nearby Spiral Galaxies

The James Webb Space Telescope (JWST) has conducted a detailed study of nearly 9,000 star clusters in four nearby spiral galaxies. The observations, published on May 6, 2026, include a section of one of the spiral arms of Messier 51 (M51), also known as the Whirlpool Galaxy. These data provide unprecedented insight into the formation and evolution of star clusters in diverse galactic environments. The study focused on characterizing the mass distribution of star clusters, a crucial parameter for understanding large-scale star formation processes. Preliminary results indicate that more massive star clusters tend to emerge more frequently than previously predicted by earlier models, suggesting potentially higher star formation efficiency in certain galactic regions or cluster assembly mechanisms not yet fully understood. JWST's near-infrared capabilities have been fundamental in penetrating the dust and gas that obscure star-forming regions, allowing for the detection and characterization of these clusters with unprecedented resolution and sensitivity. This type of observation is essential for refining our understanding of how galaxies build their stellar populations and how star clusters, which are often the building blocks of larger galaxies, form and evolve over cosmic time.

Artemis II Mission: The Crewed Return to the Moon and Its Impact

The Artemis II mission represents a crucial milestone in NASA's lunar exploration program, marking the first crewed flight of the Space Launch System (SLS) rocket and the Orion capsule. This mission, which will orbit the Moon without landing, primarily aims to test the life support systems and operational capabilities of the spacecraft with astronauts on board, laying the groundwork for future crewed lunar landing missions. It is a fundamental step towards establishing a sustainable human presence on the Moon and, eventually, for the exploration of Mars. Artemis II builds on the success of the uncrewed Artemis I mission, which demonstrated the SLS and Orion's ability to operate in the lunar environment. The crew, composed of four astronauts, will perform a series of critical tests and maneuvers during their journey around the Moon, including verifying communication, navigation, and thermal control systems. The experience and data collected from this mission will be invaluable for refining the procedures and technology needed for Artemis III and subsequent missions, which include landing the first woman and first person of color on the lunar surface. Beyond its direct space exploration objectives, the Artemis program also seeks to drive technological innovation on Earth. The inherent challenges of space exploration, such as the need for efficient life support systems, resource management in extreme environments, and the development of advanced materials, can catalyze the creation of technologies with terrestrial applications. These innovations could contribute to the development of more sustainable and efficient solutions in areas such as energy, recycling, and environmental management, thus inspiring a greener future on our own planet.

Roscosmos to Conduct Spacewalk on International Space Station

NASA has announced live coverage of a spacewalk to be conducted by two Roscosmos cosmonauts outside the International Space Station (ISS). The extravehicular activity is scheduled for Wednesday, May 27, and is expected to last approximately five hours. Live broadcast will begin at 15:45 UTC (11:45 EDT). These types of operations are crucial for the maintenance, improvement, and expansion of the ISS infrastructure. Spacewalks allow astronauts to perform tasks that cannot be executed by the station's internal or external robotic systems, such as installing new modules, repairing damaged components, or replacing obsolete equipment. These activities require meticulous planning and rigorous training due to the challenges of the space environment, including microgravity, extreme temperatures, and radiation exposure. NASA's live coverage will be available through its NASA+ platform, Amazon Prime, and the agency's YouTube channel. These events offer a unique opportunity for the public to closely observe the complex operations carried out to keep this orbital laboratory functioning, which is fundamental for scientific research in various disciplines, from materials physics to biology.

Unexpected Shockwave Surrounds Dead Star

Astronomers have detected a surprising shockwave around the dead star RXJ0528+2838, using the European Southern Observatory's (ESO) Very Large Telescope (VLT). This finding is unexpected, as known astrophysical mechanisms do not predict the formation of such a structure around a star of this type. The image captured by the VLT reveals a well-defined shockwave, posing a challenge to the current understanding of how "dead" stars interact with their interstellar environment. Normally, shockwaves form when gas and dust ejected by a star collide with the surrounding medium under specific conditions. However, RXJ0528+2838 is a compact, "dead" star, meaning its material ejection processes are very different from those of stars in active phases. The presence of this shockwave suggests that there are still ununderstood phenomena that can generate such structures in the vicinity of stellar remnants, or that the interaction of these objects with the interstellar medium is more complex than previously thought. This discovery opens new avenues of research in stellar astrophysics and interstellar medium dynamics. Scientists will now need to develop new theoretical models or refine existing ones to explain the formation and persistence of this shockwave. Understanding this phenomenon could shed light on the final evolution of stars and how stellar remnants, such as RXJ0528+2838, influence the composition and structure of the gas and dust clouds around them, potentially affecting the formation of new stars and planetary systems in the future.

Smile satellite launched to study solar wind-magnetosphere interaction

The European Space Agency (ESA) and the Chinese Academy of Sciences (CAS) have successfully launched the Smile (Solar wind Magnetosphere Ionosphere Link Explorer) satellite. The launch took place aboard a Vega-C rocket from the European Spaceport in French Guiana on May 19, 2026, at 04:52 BST / 05:52 CEST (00:52 local time). This joint mission primarily aims to investigate Earth's response to the solar wind, a crucial phenomenon for understanding space weather. The Smile satellite was carried into space on Vega-C flight VV29. This rocket, 35 meters tall and weighing 210 tons at the launch pad, used three solid-fueled stages to reach orbit. A fourth, liquid-fueled stage was responsible for the precise insertion of Smile into its orbit around Earth. The Smile mission is equipped with four scientific instruments designed to collect detailed data on the interaction between the solar wind and Earth's environment. The data collected by Smile will significantly improve the understanding of phenomena such as solar storms and geomagnetic storms. These events have the potential to affect critical infrastructure on Earth, including power grids, communication systems, and satellites. By studying how Earth's magnetosphere and ionosphere respond to the flow of charged particles from the Sun, Smile will contribute to better prediction and mitigation of space weather impacts, a field of study of increasing importance for today's technological society.