"It's like a game of billiards around the solar system, flying by a couple of planets at just the right angle and timing to ...

Asked what people should do if astronomers identified a “city-killer” asteroid on a collision course for the United States, ...

Two different teams of scientists made Martian discoveries this week, revealing a little more about our mysterious planetary ...

Two Mars gravity assists are expected, and NASA astronauts Suni Williams and Butch Wilmore are finally set to come home from an extended stay on the International Space Station. Here are five space ...

And his negotiations with President Trump about Ukraine are not just about Ukraine. Putin wants nothing less than to ...

China’s Zhurong rover used ground-penetrating radar to find signs of beaches beneath Mars’ surface, adding evidence to the ...