On July 2, 1985, the European Space Agency launched the Giotto space probe to get a close-up look at Halley's Comet. Nearly ...

Pieces of Mercury may have been found on Earth, potentially allowing scientists to study the Solar System's innermost planet.

Scientists have discovered what might be only the third known interstellar object to pass through our solar system, the ...

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

Most meteorites that have reached Earth come from the asteroid belt between Mars and Jupiter. But we have 1,000 or so ...

A European space agency created the first "artificial total solar eclipse" using a pair of satellites on Monday.

It was captured by two satellites flying in precise formation, with one spacecraft positioned 150 meters ahead of the other.