Solar System

"What surprised us, at the end, was how effective this type of impact could be in explaining Mercury's unusual structure without needing to consider multiple collisions or extremely rare conditions."

The solar system has many more moons than the one we can see in the sky. But how many do we actually know about? And how many more are waiting to be discovered?

Faint signatures detected by the Canada France Hawaii Telescope have revealed 128 new moons around Saturn, making it the indisputable frontrunner for having the most moons in our solar system.

Our solar system's journey around the center of the Milky Way takes it through varying galactic environments, and one may have had a lasting impact on Earth's climate, according to a new study.

New research suggests that a binary pair of Kuiper Belt objects, known as the Altjira system, is actually made up of three separate bodies orbiting one another in a complex triad. This rare orbital configuration is often referred to as the "three-body problem."

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 best view before they disappear.

The discovery that helium and iron can mix at the temperatures and pressures found at the center of Earth could settle a long-standing debate over how our planet formed.

A stunning photo of a "parade of planets", shows Mars, Jupiter, Uranus, Saturn, Venus, Neptune, and Mercury in alignment from Earth. The image could be the first of its kind.

A curious connection between an ancient supernova and virus diversification in one of Earth's biggest lakes means that crazy cosmic events may have had more influence on our planet than we thought.