Researchers have discovered two chemically distinct populations in a sample of 97 metal-poor stars in the Milky Way halo, potentially providing a way to identify accreted halo stars.

Analysis of blue straggler stars in 56 Milky Way globular clusters finds no evidence for a bimodal distribution in color–magnitude space due to differing formation pathways.

By constructing a detailed distance map to the Magellanic Clouds, researchers have revealed substructures within this interacting galaxy pair, including an azimuthal warp in the Large Magellanic Cloud.

Though the asteroid Apophis will not collide with Earth in 2029, there is a slim but present possibility that it will strike an artificial object orbiting Earth, potentially compromising future missions to the asteroid.

Analysis of 93 stellar halos detected in a sample of 169 high-inclination galaxies showed that high-mass galaxies have more extended halos and more active merger histories, among other findings.

PAN-z14-1 is the fourth most distant galaxy known to date, and its properties are consistent with the emerging picture of two separate galaxy populations at redshifts greater than 10.

Simulations predict that the Roman Space Telescope will discover 33 ± 9 young exoplanets in a one-month survey, expanding our understanding of the properties of planets around very young stars.

Though Type Ic supernovae are classified in part by the lack of helium lines in their spectra, recent modeling of a near-infrared supernova spectrum suggests that helium is present but undetectable in the optical.

Researchers present the first high-resolution multi-wavelength observations of a triple-nucleus merger, showing one black hole with mass of order 100 million solar masses and two with evidence of tidal disruption.

Using the SHAllow RADar split-chirp technique, researchers showed how orbital radar loss estimates could be used to map the composition of Mars’s volcanics on a global scale.

Analysis of JWST and Hubble Space Telescope observations of the galaxy “Eridu” suggests that the galaxy formed within 300 million years of the Big Bang and was quenched by a redshift of z ~ 10.

The combination of data and binary neutron star merger simulations shows that the source of GRB 230307A is unlikely to be a globular cluster; a disk origin is possible but requires finely tuned conditions.

A search for extragalactic exoplanets in data from the Transiting Exoplanet Survey Satellite detected none, but the analysis suggested that investigations of additional stellar streams may find these sought-after worlds.

In a survey of five protoplanetary disks, researchers find ice features, CO:CO₂ mixtures, micron-sized dust, atomic and molecular gas, polycyclic aromatic hydrocarbons, and more.

Using weakly and strongly alkaline materials frozen under vacuum conditions similar to those on Enceladus, researchers have shown that Raman spectroscopy can distinguish between critical mineral phases.

Detailed imaging and spectroscopy have revealed the behavior of a prominence eruption, showing evidence of transverse motions that are consistent with Alfvén waves.

The ultimate fates of the Milky Way and its neighbor Andromeda remain uncertain, with proper motion measurements with uncertainty less than 2 microarcseconds per year needed to reach a firm conclusion.

In the first 102 months of data from the Dark Matter Particle Explorer, researchers have independently confirmed the detection of the Fermi bubbles and identified a GeV excess toward the galactic center.

By subtracting the light from gas between the galaxies of a cluster roughly 4 billion light-years away, researchers uncovered more than 900 candidate globular clusters in data from JWST.

A newly discovered distribution of dense, warm gas around a protostar, roughly in the shape of the number “9,” is unlikely to be solely due to outflows and instead may be caused by magnetic flux redistribution.