Liquid Water Under the Martian Polar Ice? Maybe Not
Planetary Radio: Space Exploration, Astronomy and Science
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The Exo Planets
The first xo planets weren't found until the nineties. At least ossibly one earth like planet for every five sun like stars in our galaxy. That's a lot of earths, so many. And think about the ones that are waiting to be born,. The ones that don't even exist yet, are just being born right now. Boy, that is an exciting thought.
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