Population of Known Alien Planets Nearly Doubles as NASA Discovers 715 New Worlds

NASA’s Kepler space telescope has discovered more than 700 new exoplanets, nearly doubling the current number of confirmed alien worlds.

The 715 newfound planets, which scientists announced today (Feb. 26), boost the total alien-world tally to between 1,500 and 1,800, depending on which of the five main extrasolar planet discovery catalogs is used. The Kepler mission is responsible for more than half of these finds, hauling in 961 exoplanets to date, with thousands more candidates awaiting confirmation by follow-up investigations.

“This is the largest windfall of planets — not exoplanet candidates, mind you, but actually validated exoplanets — that’s ever been announced at one time,” Douglas Hudgins, exoplanet exploration program scientist at NASA’s Astrophysics Division in Washington, told reporters today.

Mike Wall, Senior Writer - space.com

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