Speculoos-3b, 55 light years away, is only second planetary system to be found around an ultra-cool red dwarf
Astronomers have discovered a new Earth-sized planet orbiting a small, cool star that is expected to shine for 100 times longer than the sun.
The newly discovered world, described as “practically the same size as our planet”, swings around the red dwarf once every 17 hours, making a year on the planet shorter than a single Earth day. It is only the second planetary system to be discovered around such a star, after the detection of seven rocky worlds around Trappist-1, another cool red dwarf star 40 light years from Earth.
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