Seven Earth-like planets orbiting a small star in our Galaxy called Trappist-1, revealed Wednesday, are the most recent--and arguably the most spectacular--in a string of exoplanet discoveries going back 20 years.
Seven Earth-like planets orbiting a small star in our Galaxy called Trappist-1, revealed Wednesday, are the most recent--and arguably the most spectacular--in a string of exoplanet discoveries going back 20 years.
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