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

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

Discover interesting facts about how Earth formed, what it's made of and more.

71% of the surface of our home planet Earth is covered by water Earth is our home planet and the only one known to support life. It is the fifth-largest planet and is orbited by one moon. Our ...

Our planet is the only one in the solar system to have water in its liquid form, which allows it to support life. 71% of Earth's surface is covered in water and the oceans help to keep the ...

Mercury is putting on a show for skywatchers in the evening sky after sunset. But how well do you know the planet Mercury? Here's some Mercury trivia to ponder while planet gazing.

Get excited about Earth Day with these interesting facts about the world. Traveling to new places always expands the mind, but some of these facts might not be learned on vacation. Earth Day is on ...

Reference Article: Facts about Eris, the first dwarf planet discovered. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Eris was one of the ...

Here are some Earth Day facts about our planet for you to ponder today. All 23 hours 56 minutes and 4.091 seconds of it, that is.

What makes a planet habitable? Fascinating facts by NASAStars can send out strong X-rays and UV light. This can strip a planet’s atmosphere and make it airless. Not all planets in the habitable ...