The rusty world is full of mysteries—and some of the solar system's most extreme geology. Learn more about Earth's smaller, colder neighbor.

A graphical representation of our solar system to scale - see how far the planets are from the sun in astronomical units.

Here are some interesting facts about the planets in our solar system that a 7-year-old might find fun and exciting! Jupiter is the largest planet in our solar system, and it has 79 moons!

Peculiar planetary system architecture around three Orion stars explained Date: September 3, 2020 Source: Carnegie Institution for Science Summary: In our Solar System, the eight planets and many ...

Though it's the center of our solar system, there's a lot we still don't know about the sun. It's difficult to study the sun in detail, not only because it's far away but also because it gives off ...

Earth is the sixth planet from the edge of the solar system, meaning we're none too near this cold and inhospitable frontier. But we've sent out various spacecraft over the years, so do we have ...

Here's how the Earth could theoretically leave the solar system.

Interstellar object 3I/ATLAS spacecraft close flyby SwRI mission has gained global attention. Scientists propose a mission to ...

For decades, the orbit of the Solar System's innermost planet didn't add up. 100 years ago today, Einstein's greatest achievement saved everything.