The Planet Earth

a.k.a The Third Rock from the Sun

Distance from the Sun

The Earth is, on average, about 150,000,000 km from the Sun. This distance puts it right in the middle of what is called the Goldilocks Zone. A region around a star that is neither to hot nor to cold, but rather is just right - this zone is why some planets have life and some don't.

150,000,000 km is a very large numbers so scientists developed a different unit of measure to use instead. This new number is called an astronomical unit (AU) . An AU is defined as the distance from the Sun to the Earth. 150,000,000 km = 1 AU

Earth's Moon

The Earth has 1 moon. The moon is about 384,400 km from Earth. It orbits the Earth once every 29.5 days, because of the way the moon rotates the same side of the moon always faces towards the Earth. When we watch the moon over a month the amount of the moon we can see changes - these different shapes are called phases.

The moon's diameter is about 3400 km, that makes the moon about the same size across as the United States.

Phases of the Moon 3D animation

Other Information about Earth

  • Earth is a terrestrial planet.
  • A day on the Earth lasts for 24 hours.
  • A year on the Earth - one time around the Sun - takes 365 days.
  • Earth is the only planet in our solar system where water exists as a liquid, a solid, and a gas at the same time
  • Earth's average temperature is about 15 degrees Celsius - which is about 61 degrees Fahrenheit