One of the oldest unsolved riddles in planetary science concerns the origin of the moon. Over a century ago, George Darwin ...

The moon's surface may be more than just a dusty, barren landscape. Over billions of years, tiny particles from Earth's ...

An asteroid roughly the size of a small city may slam into the Moon in 2032, and if it does, the blast could hurl clouds of lunar rock into space and toward Earth. Scientists say the odds of a direct ...

Interstellar comet 3I/ATLAS makes its closest approach to Earth on Dec. 19. Here's how you can track its progress both during ...

Pluribus imagines Kepler-22b as an ocean world that sends a gift to humanity through radio waves. In real life, no such ...

"A three-body problem is extremely complicated. Now we're dealing with four: the sun, Earth, the moon and Mars. The heavy lifting was more challenging than I initially thought." When you purchase ...

NASA's PUNCH mission is photographing the Sun like never before. It can see comets that are invisible to every other ...

The Moon is getting 1½ inches (3.8 centimeters) farther away from the Earth every year. Scientists measure the distance to the Moon by bouncing lasers off mirrors placed there by space probes and ...

Earth may have a moon today because a nearby neighbor once crashed into us, a new analysis of Apollo samples and terrestrial ...

Even the best telescopes can’t see exoplanets. It’s all about watching for jiggly stars, blue shifts, and transits.

A billion years ago, days lasted 19 hours: the balance between the oceans, the atmosphere, and the Moon slowed down the Earth ...