TRAPPIST-1 Planets Tidally Locked to Star, Have Short Orbits | Video

Wednesday, February 22, 2017 - 13:32 in Astronomy & Space

Most, if not all, of the 7 Earth-sized planets in the ultra cool dwarf star system may only face one way towards their sun, similar to Earth’s moon. Their orbits range from 1.94 days to about 20.

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