The Latest Breaking News from Solar System

A long-lost moon could explain why Mars is so different from the other rocky planets in the solar system.

The Very Large Telescope in northern Chile imaged a "super-Jupiter" exoplanet called 2M1207b, precisely 20 years ago this week. This was the first direct visual confirmation of a world beyond our solar system.

From the moment of the Big Bang, everything in the universe has kept moving, but why is that?

Our Sun drives a constant outward flow of plasma, or ionized gas, called the solar wind, which envelops our solar system. Outside of Earth’s protective magnetosphere, the fastest solar wind rushes by at speeds of over 310 miles (500 kilometers) per second. But researchers haven’t been able to figure out…

The Local Bubble is a region of surprisingly low-density gas that surrounds our solar system and other nearby regions of our galaxy — and it has a violent history.

Planets that wander deep space, unattached to a star, may form alone from small clumps of gas.

Specks of dust known as presolar grains predate our solar system and contain information about stars that died long before our cosmic neighborhood formed.

Jupiter, Saturn, Neptune, and Uranus may dominate the solar system, but their formation remains mysterious. A new model could account for these planets' rapid and efficient births.

Saturn’s moon Mimas, known for its uncanny resemblance to the Star Wars Death Star, might harbor liquid water beneath its icy shell.