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Jupiter is so massive that every other planet could fit inside it

Jupiter occupies a volume so vast that every other planet in the solar system, from Mercury to Neptune, could fit inside it ...
Space.com

Earth-size planet discovered around cool red dwarf star shares its name with a biscuit

Astronomers have discovered an Earth-size planet orbiting an ultracool red dwarf star similar in size to Jupiter. The red dwarf, located some 55 light-years away, is 100 times less bright than the sun ...