Researchers interrogated the 'sounds' of a cluster of stars within the Milky Way, uncovering a new technique for astrophysicists to probe the universe and learn more about its evolution.

The last time seven planets were simultaneously in the sky was actually not so long ago: July 2020. For that event, you had to get up before sunrise, because all of the planets were visible at dawn.

Q: Why do the planets all orbit the Sun in the same plane? —Randi Eldevik | Stillwater, Oklahoma Because of the way the Sun formed, explains David DeVorkin, a senior curator in the space history ...