New NASA supercomputer simulations show that Saturn's rings may have been formed by a 'massive collision' of icy moons. Credits: NASA/Durham University/Glasgow University/Jacob Kegerreis/Luís Teodoro ...

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A rare 'smiley face' triple conjunction is coming to Earth's morning skies on April 25, when Venus, Saturn and the crescent moon form a celestial smirk near the horizon.