Earth. It is the only home that we have ever known. Although we may look off into the cosmos and stand in awe of what we see there—supermassive stars that dwarf our entire solar system, blazing planets that whip around their sun in mere hours, blindingly luminous quasars, and pitch black planets—we shouldn't forget our own pale blue dot. This unassuming little planet may not be one of the largest heavyweights in the cosmos (in fact, it's not even a heavyweight in our own solar system), but it is still an object of mystery and wonder. So take a moment to get to know it a little bit better....

WATCH: Everything You Need to Know About Earth

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