By combining observations from space and experiments on Earth, scientists rethink the red planet's history and why it's red.

Your blood is also red because of a mixture of iron and oxygen in a molecule called hemoglobin. So in a way, the ancient connection between the planet Mars and blood wasn’t completely wrong. Rust, ...

Trans-Neptunian objects (TNO) are some of our solar system's lesser-known objects. They number in the thousands, and they get ...

Mars isn't a bright, fire-engine red, but the iron oxide in its rocks makes it appear redder than other planets, especially ...

This "true color" picture of the southeast quadrant of the planet shows a striking oval-shaped dark ring on the left and the Great Red Spot Image released on March 11, 1991 NASA Mars: This image ...

A rare cosmic event will grace the night sky Friday. Astronomers are calling it a once-in-a-generation wonder as the next will not happen again until 2040.

This week on Star Watch, you’ll be able to see some signature constellations as well as a few planets in the night sky. Let’s start off with Feb. 25: Just after the sun sets and the stars come ...