Because the Earth is doing the work of increasing the Moon's momentum, the Earth's rotation slows down in turn, as its ...

The Moon, our constant celestial companion, is drifting away from Earth at a slow but measurable rate. According to a ...

Every year, the moon, Earth's reliable celestial companion for 4.5 billion years, is getting 1.5 inches away. The distance to ...

Tides come from a difference in gravity across an object. The force of gravity exerted by the Moon is about 4% stronger on the side of Earth that faces toward the Moon, compared to the opposite side ...

Long ago, the Moon was much nearer Earth. Scientists believe a protoplanet collision created the Moon 4.5 billion years ago.

The Earth stands alone in the solar system as a habitable world, as far as we know. But that doesn’t mean we don’t get visitors, most often in the form of (usually harmless) asteroids. Some even ...

Three celestial bodies are preparing to meet up for one night in September in a cosmic conjunction that should be widely ...

Earth asteroid lurked undetected for decades until a telescope in Hawaii spotted it earlier this year. It may be Earth's ...

For the next two months, an unusual object about the size of a bus will be orbiting above our heads. Say hello to Earth’s temporary new "mini-moon." From Sept. 29 to Nov. 25, a passing asteroid will ...