Monday, November 26, 2012

Another member of Solar System - Asteroid

The asteroid belt lies between the planets Mars and Jupiter. It contains lumps of rock and metal much smaller than planets. These lumps are called asteroids or minor planets. Asteroid like other planets moves around the sun in its band area. They are not visible from Earth with the naked eye, but many may be seen through binoculars or small telescopes.

Wednesday, November 7, 2012

The Orther Member Of Solar System-The Natural Satellite

Natural Satellites

     A natural satellite is a celestial body ( planet) that moves around another bigger planet . A natural satellite does not give out light . For example , the Moon is a natural satellite of Earth . With the exception of Mercury and Venus , all the other planet in the Solar System have natural satellites . Mars has two natural satellites namely Phobos and Deimos . Big planets have more natural satellites . For examples , Jupiter and Saturn have 62 and 31 natural satellites respectively . Io and Europa are natural satellites of Jupiter and they are of the same size as our Moon . Another two natural satellites are Ganymede and Callisto . They are bigger than our Moon and are as big as Mercury . Among the natural satellites of Saturn, Titan is the biggest and is 1.5 times the size of our Moon . Uranus and Neptune have 24 and 13 natural satellite respectively . The biggest natural satellite of Neptune is called Triton.

The other members of the Solar System


    When the weather is fine at night , we can see many stars twinkling in the sky . Once in a while we can see a bright ray of light shooting across the sky and then disappears in an instant . Some people think that the stars have fallen to the fallen ? Of course not ! The ray of light is a meteor or a shooting star .
    A meteor is meteoroid that burns in a bright streak due to great friction with the air molecules in the atmosphere . What is a meteoroid ? A meteoroid is a small piece of rock that floats about in space . In the Solar System, there are millions of meteoroids that move around the Sun . Meteoroids move close to the Earth . The force of Earth’s gravity pulls some meteoroids into the Earth’s atmosphere . Most meteoroids burn up into ashes in the atmosphere before they can reach the surface of the Earth . Sometimes some meteoroids that are not burn up completely do reach the surface of the Earth and these are known as meteorites .
    Sometimes many meteors can be seen falling from the sky . This is known as a meteor shower .