Mars, Earth, Sun Line Up Perfectly This WeekendSky-watchers, gazing to the southeast at nightfall, can enjoy a brighter, seemingly bigger Mars into June.
Mercury Makes Rare Move Across The SunVisible just after 7 a.m. on the east coast, the smallest planet will appear as a tiny black dot on the face of the sun, and the transit will last for about 7 1/2 hours
NASA's Planet-Hunting Kepler Spacecraft In Emergency ModeNASA is trying to resuscitate its planet-hunting Kepler spacecraft, in a state of emergency 75 million miles away.
Texas-Resident Scott Kelly Reunited With Relatives After Year In SpaceAh, there's nothing like a blast of fresh, frigid air to welcome you back to the planet after nearly a year cooped up in space. That's the word from astronaut and Texas-resident Scott Kelly.
New Evidence Points To 9th Planet In Our Solar SystemThis possible new planet is 5,000 times bigger than outcast Pluto and billions of miles farther away, said scientists who presented "good evidence" for a long hypothesized Planet X on Wednesday.
Christmas Delivery: 1st Shipment In Months At Space StationThe International Space Station accepted its first U.S. shipment in more than half a year early Wednesday, receiving Christmas presents and much-needed groceries for the resident astronauts.
NASA's Year-Long Spaceman Takes 2nd SpacewalkNASA's one-year spaceman, Scott Kelly, ventured back outside of the International Space Station on Friday morning for some radiator work. Kelly is more than halfway through a U.S. record-setting flight.
NASA Releases Photos Of Pluto's Jumbo MoonPluto's big moon, Charon, is being revealed in all of its rugged glory in the best photos of it ever released.
All You Need To Know About 'Super Blood Moon Lunar Eclipse'Set an alarm reminder on your phone for the 'Super Blood Moon Lunar Eclipse' this SUNDAY evening.
Blue Moon? Friday's Celestial Event Comes With A CatchThis is an astronomy story that comes up only once in a blue moon, like on Friday. Maybe.
Pluto Up Close: Spacecraft Achieves Flyby, Then Calls HomeIt's official: NASA's New Horizons spacecraft has gotten humanity's first up-close look at Pluto.
Prepare To Be Amazed By NASA's Pluto FlybyPluto, reveal thyself, and Earthlings, enjoy the show. On Tuesday, NASA's New Horizons spacecraft will sweep past Pluto and present the unexplored world in all its icy glory.