In the bigger picture, “down” could be defined as being below the plane of the solar system, which is known as the ecliptic.

In the bigger picture, "down" could be defined as being below the plane of the solar system, which is known as the ecliptic.

A Mars spacecraft launched from Cape Canaveral, Florida, has been AWOL. But NASA hasn't given up hope of restoring contact ...

"Recent studies suggest that the lunar farside experienced a magma ocean evolution similar to that of the nearside," the team ...

Spectacular clouds swirl across the surface of Jupiter. These clouds contain water, just like Earth's, but are much denser on ...

Researchers find that shifts in Earth’s orbit can trigger abrupt climate changes, even in warm periods without ice sheets.

Study finds Mars helps pace Earth's ice ages through gravity. Remove Mars, and a major 2.4-million-year climate rhythm ...

The rotation of Earth is gradually slowing, and a sudden stop would have catastrophic consequences for the planet.

NASA lost contact with the MAVEN probe in Mars orbit, and teams are working to reestablish communications after an unexpected ...

Which way is ‘down’ has a different answer depending on where you are on Earth, in the solar system, in our galaxy and beyond ...