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With several wildfires burning in Colorado, the smoke has to go somewhere, of course. But where? This photo from NASA may hold the answer.Currently 13…

Carl Sagan once wrote a mischievous paper called "A Search for Life on Earth from the Galileo Spacecraft". Being a living Earthling, he knew he'd find life here. So what was he reallyup to? The experiment he ran in 1990 is about to be repeated in a few weeks. Here's my closer look.

Many people know how to buy things in cyberspace. But what about doing business in outer space? That's the question PayPal wants to answer. Citing the looming era of space tourism, the company is starting the Galactic project with the SETI Institute, to "make universal space payments a reality."

New observations of a fairly well-studied star have revealed a system with at least six planets, three of which are in the star's habitable zone. This is the first time that three such planets have been spotted orbiting in this zone in the same system.

In a first, Russian cosmonauts will carry an official Sochi 2014 Olympics torch to the International Space Station and then out on a spacewalk.

The full moon will be at its closest to the Earth all year, making it appear 14 percent to 30 percent brighter than normal.

The White House and NASA want the public's help in hunting for asteroids that could potentially smash into Earth. They're also looking for a perfect space rock to capture so that astronauts could go there and study it.

Thirty years ago Tuesday, Sally Ride became the first American woman to fly in space. She was aboard the shuttle Challenger. Less than three years later, it would explode on takeoff, killing seven crew members.

The three-person crew includes China's second female astronaut, being billed as the country's "first teacher in space."

Kids were told in the '60s that the astronauts loved that orange drink. Well, the second man on the moon says otherwise.