Skywatchers will witness a rare event as the Moon, Mars, and Mercury appear close together in the twilight sky this October.

THAT’s NO MOON - Earth doesn’t just have one moon; sometimes, it has a companion satellite or “mini-moon.” Discovered on ...

There are a couple of ways that scientists can date planets, so which planets formed first in our solar system?

Three celestial bodies are preparing to meet up for one night in September in a cosmic party that should be widely visible in the sky. What makes the close approach of the objects so special this time ...