Slightly larger than Earth’s moon, Mercury is the smallest planet in the solar system, and is the closest to the sun at an average of 36 million miles (58 million km) away.

Astronomers on Wednesday confirmed the discovery of an interstellar object racing through our Solar System -- only the third ...

As the closest planet to the Sun, Mercury is exposed to the star's enormous gravitational field. And it's really stressful.

They’re not a perfect match, but it’s way too hot on the first planet for us to hop over and confirm for ourselves.

Scientists may have solved alongstanding mystery in the study of Mercury. For the first time, pieces of the Solar System’s ...

A mission that could reach Mercury on solar sails alone. Story by David Dickinson • 6d. T urns out, it's as tough to drop inward into the inner solar system, as it is to head outward.

In 2026, a European Space Agency (ESA)/Japan Aerospace Agency (JAXA) joint mission will fall into orbit around Mercury, the solar system's smallest planet. However, to do that, the spacecraft ...

With a total volume little more than the Moon, it is the smallest planet in the Solar System and is situated the closest to the Sun. Mercury has no atmosphere to retain heat, meaning that the ...