Neighboring colossus: With a diameter of almost 200,000 light-years and around 1.6 trillion solar masses, the Andromeda galaxy is larger and heavier than the...
Although metal-poor stars irradiate their planets with more UV light than metal-rich ones, the ratio of ozone-forming UV-C to ozone-depleting UV-B radiation allows a...
Arrokoth's uniform color and composition suggests the planetoid formed from a small, homogeneous cloud of gas and dust in the primordial Solar Nebula, rather...
Star-forming region N44 in the Large Magellanic Cloud, about 170,000 light-years away: The oval bubble several hundred light-years across on the right, which was...