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NASA has announced the discovery of a family of 7 Earth-like exoplanets that are orbiting a nearby star, an ultracool dwarf called TRAPPIST-1. The observations were made using NASA’s Spitzer Space Telescope, building on earlier findings announced last year by a team from the University of Liège in Belgium, using observations from the TRAPPIST (Transiting Planets and Planetesimals Small Telescope) telescope at the La Silla Observatory in the Atacama desert, Chile. Not only is the TRAPPIST-1 system rich in earth-sized, rocky planets, ripe for comparatively easy study, but also three of these planets lie within their star’s habitable zone.
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NASA has just announced the discovery of an earth-like planet orbiting a star similar to our sun, and within the star’s habitable zone. The planet has been designated Kepler-452b, and is the first such planet ever discovered. So far, nearly 4000 planets have been discovered in so-called ‘goldilocks zones’ around distant stars–regions where they are neither too hot nor too cold to sustain life. But all of these planets have been determined to be either very small, very large, or gas giants. Kepler-452b is a "bigger cousin of Earth." It has a 385 day orbit and is 5% farther from its star than Earth is from the sun. Its parent star is Kepler-452. It also has gravity twice that of Earth’s.
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