Astronomers say they have solved an outstanding problem that challenged our understanding of how the universe evolved—the spatial distribution of faint satellite galaxies orbiting the Milky Way. These satellite galaxies…
Artemis 2 is scheduled to launch in 2024, but it may be tough for NASA to hit that target. Orion's successful splashdown Sunday afternoon (Dec. 11) returned some critical components…
Two new studies suggest that certain tetrahedral arrangements of galaxies outnumber their mirror images, potentially reflecting details of the universe’s birth. But confirmation is needed. Physicists believe they have detected…