How can we successfully collect and return samples from Mercury and Venus to Earth? This is what a recent study presented at ...

Turns out, it's as tough to drop inward into the inner solar system, as it is to head outward. The problem stems from losing ...

"What surprised us, at the end, was how effective this type of impact could be in explaining Mercury's unusual structure ...

Mercury has the shortest and fastest orbit around the Sun and experiences dramatic temperature changes as it rotates. It is a world of extremes. Explore facts about our solar system's fastest planet.

The sun just released a burst of a rare form of helium known as helium-3 ( 3 He). What's peculiar is this lightweight, ...

But what’s it like on other planets? There are eight planets in our solar system. The closest one to the sun is Mercury, then it’s Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.

The solar system has many more moons than the one we ... The two innermost planets, Venus and Mercury, will shine together low in the western sky at sunset on March 10. Here's how to get the ...