All About Earth

Explore Earth! Click and drag to rotate the planet. Scroll or pinch to zoom in and out. Credit: NASA Visualization Technology Applications and Development (VTAD)

What is Earth like?

Our home planet Earth is a rocky, terrestrial planet. It has a solid and active surface with mountains, valleys, canyons, plains and so much more. Earth is special because it is an ocean planet. Water covers 70% of Earth's surface.

Our atmosphere is made mostly of nitrogen and has plenty of oxygen for us to breathe. The atmosphere also protects us from incoming meteoroids, most of which break up in our atmosphere before they can strike the surface as meteorites.

Since we live here, you might think we know all there is to know about Earth. Not at all, actually! We have a lot we can learn about our home planet. Right now, there are many satellites orbiting Earth taking pictures and measurements. This is how we can learn more about weather, oceans, soil, climate change, and many other important topics.

a cartoon of a smiling Earth saying, Life is great!

Earth Fun Facts

a merit badge with a tree

Earth is the only planet in our solar system we know of that supports life.

a merit badge that shows a planet with a rocky surface

Earth is a terrestrial planet. It is small and rocky.

a merit badge with a planet and an arrow encircling it, showing rotation

A day on Earth lasts a little under 24 hours, but since you live here, you probably knew that already.

a merit badge with a sun and an arrow encircling it, showing revolution around the sun

One year on Earth lasts 365.25 days. That 0.25 extra means every four years we need to add one day to our calendar. We call it a leap day (in a leap year).

a merit badge with an orange planet and a thin blue band above it

Earth's atmosphere is the right thickness to keep the planet warm so living things like us can be there. It is mostly nitrogen, and it has plenty of oxygen for us to breathe.

a merit badge with an ancient symbol

We have known about our own planet since ancient times, of course. But we didn't know our place in the solar system or universe for a long time.

a merit badge that shows an orange planet horizon and a moon in the background

We have one moon. We're the only planet to have just one moon.

a merit badge with a simplified spacecraft made of a square and two rectangles

Earth has lots of spacecraft watching it. There is still a lot we can learn about our home planet.

What does Earth look like?

A photo of Earth in the background looking very small. The moon's surface is in the foreground, so Earth is rising over the moon.

This Apollo 11 picture taken by an astronaut in 1969 shows the Earth rising over the moon. Doesn't it look small?

A photo of the northern portion of the Earth. Swirls of white cover it.

This is a view of Earth looking just at the northern portion.

A photo of Earth showing North and South America, oceans, and swirling clouds.

A NASA camera on the Deep Space Climate Observatory satellite took this picture of the entire sunlit side of Earth from one million miles away.

For more information visit:

NASA Solar System Exploration

article last updated July 17, 2019

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