Earth formed over 4.5 billion years ago from a swirling cloud of gas and dust squished together by gravity. That same cloud gave rise to our entire solar system, including our star, the sun.

With a radius of 3,959 miles, Earth is the fifth largest planet in our solar system, and it's the only one known for sure to have liquid water on its surface. Earth is also unique in terms of ...

One million alien visitors from another star system could already be lurking in the solar system. We aren't talking about ...

A collection of down-to-Earth facts about our planet and its place in the solar system. This collection introduces the Sun as the main source of light and heat on Earth. It explains that the Earth ...

Need a new idea to keep kids entertained? Try stargazing. Free learning activities and videos about the solar system Free learning activities and videos about the solar system Free learning ...

Our solar system's journey around the center of the Milky Way takes it through varying galactic environments, and one may ...

It was controversial as accepted wisdom at the time (supported by the church) was that Earth was at the centre of the universe. Create your own masterpiece of the solar system. You could paint it ...

According to the researchers, taking an actual photograph of the Oort Cloud's theorized spiral from Earth would be incredibly difficult, and there are currently no resources dedicated to such an ...

Discover how a giant interstellar cloud known as the solar nebula gave birth to our solar system and everything in it. The solar system as we know it began life as a vast, swirling cloud of gas and ...

Here are 12 facts related to solar storms—how ... up to $2.6 trillion just in the U.S. It’s not just Earth—the rest of the ...

IT’S been nearly 40 years since the first planet outside of our Solar System was discovered. Since then, more than 5,800 ...

Primordial helium from the beginning of the solar system may be stuck inside Earth's solid core, new research suggests. The findings could have implications for a long-standing debate about how ...