Dunia Sains Tahun 4 - " The Solar System " : Mercury

09 October 2012

Mercury - the closest planet to the sun

Mercury is the closest planet to the sun. As such, it circles the sun faster than all the other planets.

Number of Moons: 0
Rings: No
Time it takes light to reach Mercury from the Sun:
3 min 16 sec
Mass: 3.3010 x 10²³ kg
Diameter: 4,878 km
Density: 5,400 kg/m³
Length of Day:
58.65 Earth Days
Length of Year:
87.97 Earth Days

http://www.youtube.com/watch?v=e0iuQC7e94M&feature=player_embedded#!

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What Is The Solar System?

Our solar neighborhood is an exciting place. The Solar System is full of planets, moons, asteroids, comets, minor planets, and many other exciting objects. Learn about It.

The Solar System is made up of all the planets that orbit our Sun. In addition to planets, the Solar System also consists of moons, comets, asteroids, minor planets, and dust and gas.

Everything in the Solar System orbits or revolves around the Sun. The Sun contains around 98% of all the material in the Solar System. The larger an object is, the more gravity it has. Because the Sun is so large, its powerful gravity attracts all the other objects in the Solar System towards it. At the same time, these objects, which are moving very rapidly, try to fly away from the Sun, outward into the emptiness of outer space. The result of the planets trying to fly away, at the same time that the Sun is trying to pull them inward is that they become trapped half-way in between. Balanced between flying towards the Sun, and escaping into space, they spend eternity orbiting around their parent star.

http://www.kidsastronomy.com/solar_system.htm

Dunia Sains Tahun 4 - " The Solar System "

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09 October 2012

Mercury - the closest planet to the sun

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