Filmmaker Adam Nemoy helps celebrate the 90th anniversary of Pluto's discovery this month at the 6th annual 'I Heart Pluto' ...

These events, often called "planet parades" or "planetary alignments," though not exceedingly rare, are worth observing since they don't happen yearly.

Witness a rare celestial spectacle as seven planets align in the night sky for one night in late February, offering a ...

Space agencies have systems in place to spot, track, and forecast the future orbits of potentially hazardous asteroids.