Atmosphere discovered on Earth-like exoplanet in our 'galactic backyard' | ABC NEWS

Astronomers say they are one step closer to finding a habitable, Earth-like planet beyond our solar system with the discovery of an atmosphere on a rocky planet. The planet, named LHS 1140 b, is 70 percent larger than earth and is about 49 light years away. Harvard University's Collin Cherubim explains how it was discovered and what we can learn from it.

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