At the moon's north and south poles, permanently shadowed craters remain so cold that water ice and other frozen compounds can persist for billions of years. Scientists think these ancient deposits ...

It was long thought, up until recently, that asteroids and comets delivered Earth's oceans during the early Solar System.

The object dubbed Earth's "second moon" is actually a quasi-satellite that's accompanied the planet since 1957 — not a true ...

Earth’s atmosphere is slowly leaking into space, and new research shows some of it reaches the Moon, where it may be ...

For a long time, scientists assumed that Earth's water was delivered by asteroids and comets billions of years ago. This coincided with the Late Heavy Bombardment (ca. 4.1 to 3.8 billion years ago), a ...

Earlier research held that meteorite impacts from the solar system's early days were a major source of Earth's water.

The Moon is working its way through the lunar cycle.

A long-standing idea in planetary science is that water-rich meteorites arriving late in Earth’s history could have delivered ...

The craters bear the names of astronomers who revolutionized our understanding of the night sky.

Astronomers are testing a quieter way of searching for moons beyond the solar system, using careful measurements of motion ...

The U.S. is the only country to have ever sent humans to the moon.

The first new moon of the year marks the beginning of a period of great change. Here’s what your zodiac sign says you should ...