Photos and videos of astronauts on the ISS show them floating around, but saying there's zero gravity isn't fully accurate.

Mars has two moons, but they're not quite like Earth's moon. That's raised a lot of questions about where they're from, ...

It's largely agreed that the moon was created around 4.5 billion years ago when a protoplanet collided with early molten ...

As space agencies race to set foot on the Moon, Mars, and elsewhere, a not-so-glamorous problem could be the key to success: ...

Mars is closer than ever, but the human body isn’t ready. Inside the biological war against radiation, microgravity, and ...

As space agencies race to set foot on the Moon, Mars, and elsewhere, a not-so-glamorous problem could be the key to success: the functionality of a rover’s wheels in alien dirt. When NASA’s Spirit ...

A matchstick lit aboard Tiangong space station produced a slow-floating spherical flame, highlighting how microgravity ...

A new study reveals that the largest lunar crater, South Pole-Aitken basin, was formed by an oblique impact that shaped the ...

Japanese scientists have launched the world’s first experiment to ferment sake in space, aiming to determine whether ...

When a rocket launches, the forces are intense enough to strain metal and push the human body to its limits. Yet Bacillus ...