Looking up and around during the day, it's easy to understand why the ancients believed that we live under a great dome of sky.

There's nothing innate about the Earth or its atmosphere that marks the boundaries of low Earth orbit. This is a distinction ...

"The findings not only provide further evidence to support the theory of a Martian ocean but also present, for the first time ...

The walkthrough mockup is one of the first artifacts of the Gateway platform to go on display.

After a decade-long search, some scientists say a growing number of clues point to the existence of a hidden planet in the Kuiper Belt beyond Neptune — and they may soon have the opportunity to find ...

Scientists have developed a new method to compute how tides affect the interiors of planets and moons. Importantly, the new ...

Large galaxies, like the Milky Way, attract smaller galaxies. Our solar system 's cosmic neighborhood spans 100,000 ...

The probe will orbit the sun "close enough to pass inside a solar eruption, like a surfer diving under a crashing ocean wave, ...

NASA Mars Odyssey orbiter has been rotated to capture imagery of the Red Planet that would be similar to what an astronaut would see. Odyssey Deputy Project Scientist Laura Kerber explains. Credit: ...

The Indicator from Planet Money A little show about big ideas. From the people who make Planet Money, The Indicator helps you make sense of what's happening today. It's a quick hit of insight into ...