Hidden 'Planet 9' could be 3 times BIGGER than Earth – but Nasa still can't see it
Hidden ‘Planet 9’ could be 3 times BIGGER than Earth – but Nasa still can’t see it lurking at edge of our solar systemBy Harry Pettit, Senior Digital Technology and Science ReporterA VAST and unseen world may lurk on the edge of our solar system – and space boffins think it's three times the size of Earth.
They studied the paths of objects in the Kuiper belt, a region beyond Neptune filled with comets, asteroids and chunks of space ice.That's because the planet's mass decides its gravitational pull, which may be nudging KBOs into strange orbits. Space experts have long suspected that a ninth planet is lurking in the outer reaches of our solar system.Planet Nine has never been observed, and was first suggested in 2016 to explain the wobbly orbits of objects in the Kuiper Belt, a region beyond Neptune filled with dwarf planets and icy debris.
It is made up of debris leftover from the formation of the solar system that has long since frozen over.
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