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An eclipse happens when
one object blocks out
the sunlight to another.
The Moon passing in front
of the Sun is known
as a Solar Eclipse.
When the Earth casts a
shadow on the Moon,
it is a Lunar Eclipse.
Solar Eclipse
Earth is the third planet out from the Sun and home to many species of flora and fauna, including humans. It is the only planet known to have life on it.
It has a significant atmosphere, which is composed primarily of Nitrogen (78%) and Oxygen (21%) gases. Around 70% of the surface of Earth is covered in liquid water.
The rotational axis of Earth tilts around 23° to the plane of the Solar System, and this gives rise to the four seasons of Spring, Summer, Autumn and Winter.
It has one large natural rocky satellite, called the Moon, which orbits once every 27.3 days. The Moon is the fifth largest natural satellite (or moon) in the Solar System.
| Facts and Figures | Mercury | Venus | Earth | Mars | Jupiter | Saturn | Uranus | Neptune |
| Orbital Distance (AU)1 | 0.38 | 0.72 | 1.0 | 1.52 | 5.2 | 9.45 | 19.2 | 30.06 |
| Radius (KM) | 2,440 | 6,052 | 6,378 | 3,397 | 71,492 | 60,268 | 25,559 | 24,746 |
| Mass (Earth Masses)2 | 0.055 | 0.82 | 1.0 | 0.11 | 318 | 95.2 | 14.5 | 17.1 |
| Year Length (Earth Days) | 88 | 225 | 365.25 | 687 | 11.9 Years |
29.45 Years | 84.0 Years | 164.8 Years |
| Day Length (Earth Days) | 176 | 117 | 1.0 | 1.03 | 0.41 | 0.43 | 0.75 | 0.67 |
| Surface Gravity (g)3 | 0.38 | 0.91 | 1.0 | 0.38 | 2.34 | 0.93 | 0.92 | 1.12 |
| Surface Temperature | -200 to 400 °C | 460 °C | -80 to 50 °C | -150 to 20 °C | -110 °C | -140 °C | -190 °C | -200 °C |
| Number of moons | 0 | 0 | 1 | 2 | 63 | 60 | 27 | 13 |
