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Exoplanet search turns up 15 new alien worlds, and one may have water

11 need-to-know things about our solar system

Wandering rogue moons may be as common as stars

Jupiter's Great Red Spot is growing taller as it shrinks... and turning orange

Water on dwarf planet Ceres is driving an active surface

Saturn's icy moon Dione shines in stunning Cassini photo

Scientists discover 15 new planets, including 'super-Earth' that could harbor liquid water

You can hunt for alien planets at home with Google's AI

Giant alien planet may lurk inside star's lopsided dust structure

Astronaut Scott Kelly: My incredible year in space and the 'crazy ride' back to Earth