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Astronomy Cast Ep. 644: Is Earth… Normal?
Season 15
Episode 644
Published 3 years, 10 months ago
Description
Astronomy Cast Ep. 644: Is Earth… Normal? by Fraser Cain & Dr. Pamela Gay We've now discovered thousands of exoplanets, we're learning more and more about the kinds of planetary systems there are out there across the Universe. But are planets like Earth unique or totally rare?