Earth

Introduction

The Earth is the third planet from the Sun and the only astronomical body known to harbor life. According to radiometric dating and other sources of evidence, Earth formed over 4.5 billion years ago. Earth’s gravity interacts with other objects in space, especially the Sun and the Moon, Earth’s only natural satellite. Earth revolves around the Sun in 365.26 days, a period known as an Earth year. During this time, Earth rotates about its axis about 366.26 times.

Distance from sun

The Earth is about 93 million miles from the Sun.

Year length

It takes 365.26 days for the Earth to go around the Sun. This is called a year.

Day length

It takes 24 hours for the Earth to spin around once on its axis. This is called a day.

Fun fact

The Earth is the only planet in our solar system with liquid water on it.

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