Scientists may have solved alongstanding mystery in the study of Mercury. For the first time, pieces of the Solar System’s innermost planet could be on Earth, potentially shedding light on a world ...

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.

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

Mercury is the closest planet to the sun and the smallest planet in the solar system. ... NASA's MESSENGER spacecraft discovered water ice in the craters around its north pole, ...

The planet Mercury is mainly made up of iron. Mercury has no moons. The planet's close proximity to the Sun makes having moons impossible, ... It is not known exactly when the planet was first ...

When electrons from solar wind, accelerated by Mercury’s magnetic field, rain down on the barren ground near the planet’s poles, minerals in the ground react by fluorescing, or emitting x-rays.

Lewis Swift discovered 13 comets but zero planets. ... Mercury, so firmly embraced by our star's gravitational field, lies deep within that solar gravity well." ...