SPACE | Dec 27, 2017 | The Most Intriguing Alien Planet Discoveries of 2017 | .. Scientists spotted seven Earth-size alien planets orbiting one dim red star this year, and a lot of other strange exoplanets — ranging from an Earth-size ice ball to the hottest planet ever found and many more, plus a star that seems to have gobbled up something like 15 rocky worlds .. | Blogger: 1. The TRAPPIST-1 family. 2. A real scorcher(KELT-9b). 3. Home close to home(Ross 128b). 4. New solar-system rival(Kepler-90). 5. Pen pals(GJ 273). 6. Giant snowball(OGLE-2016-BLG-1195Lb). 7. RIP rocky planets(Kronos)... |

Researchers identified 7 planets circling the star TRAPPIST-1 this year, three of which might be able to keep liquid water on its surface.Credit: R. Hurt/T. Pyle/NASA

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