The enormous visitor to our solar system may have been about 8 times the mass of Jupiter, and come nearly as close to the sun ...

Emily Simpson has loved space since she was a 10-year-old kid celebrating her birthday at a planetarium. Now a recent Florida ...

Discover Snapchat Planets Order, a creative feature in Snapchat Plus to rank your closest friends like planets in a solar ...

The joint European-Japanese mission is only the second survey of Mercury, the least explored planet in the inner solar system ...

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Comets and asteroids also orbit the sun. Together the Sun, the eight planets, the moons, asteroids and comets make up our Solar System.