Contrary to online rumors, Earth still only has one true moon, but astronomers have discovered a so-called 'quasi-moon.' Here's what it is.

Something called a "quasi-moon" was discovered in August, and now many are wondering if we should count our new neighbor as a second moon.

Quasi-moons are not real moons and don't actually orbit the Earth, although they sometimes appear to do so for short periods of time, Phil Nicholson, professor of astronomy at Cornell University, told ...

People living, working and visiting London have seen substantial reductions in air pollution following the introduction of ...

Ian Randall is Newsweek's Deputy Science Editor, based in Royston, U.K., from where he covers everything science and health ...

A faint orange dot captured by the James Webb Space Telescope (JWST) could be the most distant galaxy ever detected. The ...