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.