New images of interstellar object 3I/ATLAS show a sunward anti-tail extending over 500,000 kilometers, surpassing the ...

The Moon is not a fixed lantern in the sky but a slow-moving partner that is gradually edging away from Earth. That retreat ...

The interstellar comet 3I/ATLAS is just days away from coming as close to Earth as it will ever get. Here's how you can track ...

Doing the persnickety calculations of how fast clocks tick on Mars relative to Earth, two scientists have discovered that ...

"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 ...

CAPE CANAVERAL, Fla. (AP) — Saturn’s giant moon Titan may not have a vast underground ocean after all. Titan instead may hold ...

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

Learn how we know the Earth is round, and the science behind the shape of our gravitational field.

An artist's impression of the collision between the early Earth and Theia, which may have formed the moon MPS / Mark A. Garlick Around 4.5 billion years ago, a planet called Theia is thought to have ...

The comet will come much closer to Jupiter in March, zipping within 33 million miles. It will be the mid-2030s before it reaches interstellar space, never to return, said Paul Chodas, director of NASA ...

A vast ring of rocky leftovers between Mars and Jupiter, the asteroid belt preserves clues to how the planets — and Earth ...

Regular, alternating layers in Gale Crater may have been deposited as the result of tides raised by a moon at least 18 times ...