These 80 space trivia questions are great to play with friends, challenge your family with or play by yourself. See how much you really know about the universe, below. Related: What a Wonderful ...

How far it is from the sun: 886 million miles (1.4 billion kilometers), on average How big it is: 72,400 miles (116,500 km) across, or almost 10 times the size of Earth. How many moons it has: At ...

TOLEDO, Ohio — Four major planets are in prime positions for nighttime viewing. But with bitterly cold temperatures sweeping much of the nation, you may want to wait a few days before doing any ...

This January, the seven visible planets will align in the sky in a “planet parade.” The rare celestial event will start just before Jan. 21, with Venus, Mars, Jupiter, Saturn, Neptune and Uranus ...

With its beautiful rings, Saturn may be the most stunning planet in the solar system. It is the sixth planet from the sun and the second-largest planet in the solar system, after Jupiter. Though ...