Earth has a newly discovered—albeit temporary—companion in its journey around the sun. In research published this month in ...

Astronomers have found yet another quasi-moon companion of Earth in its orbit around the Sun believed to be a chunk of our ...

Whenever astronomers detect something new moving through our region of space, like an interstellar object or an unusual ...

Orbital data reveals that rocks transforming deep inside the Earth may be responsible for changes to our planet’s ...

This new propulsion system could rewrite the rules of spaceflight—not to mention completely defy conventional physics.

Scientists have identified a rare geological shift near the boundary between Earth's core and mantle after satellite data revealed an unexplained change in the planet's gravitational field. The change ...

The Indian Ocean Geoid Low (IOGL), a significant gravitational anomaly, has puzzled scientists for decades. Research suggests ...

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

Every year, the moon, Earth's reliable celestial companion for 4.5 billion years, is getting 1.5 inches away. The distance to the moon is calculated by measuring the amount of time it takes for light ...