Earth is our home planet, and it's the only place in the universe where we know for certain that life exists. Earth formed over 4.5 billion years ago from a swirling cloud of gas and dust squished ...

If you can name it, you're a true Earth Day fan. Otherwise, read on to find out what it is along with other fun facts about the planet and this annual celebration of Mother Earth. There's more ...

but since our planet was formed around 4.6 billion years ago, the length of a day has been gradually growing. A day is the time period of a full rotation of the Earth with respect to the Sun.

Here are some fun facts about Earth as we celebrate this planet we live on for Earth Day. The Earth’s diameter at the equator is 7,926 miles. Sign up for our Newsletters Our atmosphere is made ...

There's a lot we don't know about our home planet and solar system. The post Can You Answer These Basic Questions About Earth ...

NASA is tracking a bus-sized asteroid that will be zooming past the Earth today at a speed of nearly 28,028 miles per hour. The space rock, known as "2025 FO6," is estimated to be about 35 feet across ...

Today, Earth Hour is one of the world’s largest grassroots environmental movements, which takes place every year with the same aim as back in 2007—to unite the world in support of people and the ...

New research led by a York University professor sheds light on the earliest days of Earth's formation and potentially calls ...

Billions of years ago, the fourth planet from the sun could have been mistaken for Earth’s smaller twin, with liquid water on its surface—and maybe even life. Now, the world is a cold ...

Explore facts ... system's fastest planet. Mercury is slightly larger than our Moon - 15,329 kilometres around its equator. Its radius, the distance from the core's centre to the surface, is 2,440 ...