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.
from Space.com bit.ly/2l8WimY
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.
from Space.com bit.ly/2l8WimY
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