"Rings are mostly made of ice and small rocks," said William Saunders, a planetary scientist at NASA's Langley Research ...

If we were to rewind the clock back 4.5 billion years, our planet would be massively different. And seeing Earth from space, you’d notice a glaring omission: the Moon would not be there.

dwarf planets and moons in our solar system do have seasonal cycles — and they can look wildly different from the ones we experience on Earth, experts told Live Science. To understand how other ...

Ah, Earth. We may not think about our planet on a day-to-day basis, but the world we live in is a pretty interesting place. The third rock from the Sun—and to this day, the only one with known ...

Earth Day started in 1970 when people — including Wisconsin Sen. Gaylord Nelson — brought attention to the impact oil spills, pollution and smog were having on the planet. "Then in January ...

So which planets in our solar system have rings? All four giant planets — Jupiter, Saturn, Uranus and Neptune — sport these ...

On April 22, 1970, people gathered at events across the country to raise awareness about the environmental issues impacting our nation and the planet. While the Earth Day movement has helped raise ...

Now celebrating its 55th anniversary, this year's Earth Day theme, "Our Power, Our Planet," calls for people worldwide to unite behind renewable energy and promote clean electricity by 2030 ...

So, eventually, all life on Earth will be destroyed by the sun. The sun is gradually expanding, and so we do at some point need to be a multi-planet civilization because Earth will be incinerated ...

Did the chemical components necessary to create water on Earth come from space or already exist here? One prevailing notion holds that asteroids containing either water of its building blocks ...