Our sun is not the only star in the Milky Way Galaxy; that goes without saying. Astronomers have spotted around 1,800 exoplanets. Some are big. Some are small. Some are even similar in size to Earth. ... more 
Our sun is not the only star in the Milky Way Galaxy; that goes without saying. Astronomers have spotted around 1,800 exoplanets. Some are big. Some are small. Some are even similar in size to Earth. More are gassy. A few are rocky. And a select bunch, around 20 or so, even reside with the prized “Goldilocks zone,” the region around a star within which planetary objects with sufficient atmospheric pressure can support liquid water on their surfaces. less 
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Wochit
Thu, Apr 17, 2014 3:50 PM EDT