On Oct. 6th, 1995, the reported discovery of jupiter-like exoplanet 51 Pegasi b catalyzed serious scientific quests for another Earth-like world. Told by the astronomers who competed and collaborated, this video chronicles why we now believe there are more than a billion rocky worlds, in possibly habitable orbits, throughout our Milky Way Galaxy. (How to Find ‘Strange Life’ on Alien Planets)
Credit: NASA/JPL-Caltech
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