WHERE IS IT?
Earth in numbers
- 12,756 km
- Width
- 24 hours
- One day
- 365 days
- One year
- 1
- Known moons
- 71%
- Of the surface covered by ocean.
- 23.4°
- Axis tilt. It, not our distance from the Sun, gives us seasons.
- 1.3 s
- Time for light to cross from the Moon to you.
WORTH KNOWING
A rocky planet with liquid water on its surface.
Earth is the only place we know of where liquid water sits on the surface. Its air and magnetic field shield life from the harshest radiation.
Seen from the Moon, Earth hangs in the same spot in the sky and goes through phases, just as the Moon does for us.
Who has been there
- 1968Apollo 8Took Earthrise, the first colour photo of Earth from lunar orbit.
- 1990Voyager 1Pale Blue Dot: Earth from about 6 billion km.
- 2000 →International Space StationPeople have lived in orbit continuously since November 2000.