Most of the star nearest to Earth are red dwarfs, but they are too dim to be seen with the naked eye.
UFOs are very real, as we have recently seen — but that doesn't mean E.T. has been violating our airspace.
Here are the some of the best science fiction books Space.com's writers and editors have read and loved.
Learn about the physical characteristics of Saturn and its famous rings, what we know about Saturn’s moons and Saturn’s roots in Greek mythology.
The solar system has a sense of humor: A decade from now, on Friday, April 13, 2029, a large asteroid will streak across the sky — but it's a cause for excitement, not fear, scientists say.
Beyond Neptune, the Kuiper Belt is a vast region of icy objects called Kupier Belt Objects (KBOs), including dwarf planets Pluto, Eris, Maumea and Makemake — and possibly a true ninth planet.