From its scorching temperatures to its oddball rotation, there's a lot to learn about the second planet from the sun.

Living up to its name, Mercury is the fastest planet in the solar system, speeding along at about 29 miles per second and ...

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

Earth is the planet we have the best opportunity to understand in detail—helping us see how other rocky planets behave, even ...

The fifth planet from the sun, Jupiter is what watercolor dreams are made of. Vibrant bands of clouds ripple around its thick ...

A strange fossil at the edge of the solar system just shook up Planet Nine theories Date: July 20, 2025 Source: National Institutes of Natural Sciences Summary: A tiny object far beyond Pluto ...

These ancient stars are incredibly dense. A teaspoonful of their matter would weigh as much on Earth as an elephant—5.5 tons.