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.