Nebulas are spectacular clouds of gas and dust where stars come to life and fade away. Their radiant beauty has captivated ...

On Oct. 13, 1773, Charles Messier spotted the Whirlpool Galaxy (M51) for the first time. Writing of it a few months later, he ...

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

The outline of the cosmic simian's mouth and face are sculpted from a colossal cloud of molecular dust located some 500 light ...