Thursday, 5 May 2011

LESSON 1: Our Solar System


Do u know that in our Solar System, there are the Sun and the other nine planets that circles around the Sun according to their own orbits. The planets are Mercury, Venus , Earth, Mars , Jupiter, Saturn, Uranus, Neptune and Pluto. The Sun is the center of the Solar System. All the nine planets move around the Sun in a large oval path. The planets also spin by itself.

the Sun and the nine planets



Not only that, i also learnt that in outer space, there are other things that we need to know. There are 3 of them which are asteroids, comet and also meteors.

1. Asteroids are the huge chunks of rocks that travel round the Sun.


Are also known as the Minor Planets. 

Orbit the Sun mainly between the orbits of Mars and Jupiter. 

Usually range in size from 1 kilometer to 1000 kilometers across. 

Are difficult to observe because of their small size. 
Sometimes have moons that orbit them. 



PICTURES OF ASTEROIDS





photos from: google images.

2. Comets have long glowing tails.



objects made up of gas, ice and dust. They travel around the Sun in an orbit. 

Are warmed up as they approach the Sun. This causes the Comet to form a head and tail. The head is the cloud-like mass we see in the front. The tail is the trailing part which is made up of small particles and ice. 

Lose mass each time they pass through the inner regions of the Solar System. 

Are usually named after the person who discovered them. 

Halley's Comet  and Hale-Bopp Comet  are two famous comets.



PICTURES OF COMET




photos from: google images.

3. Meteors are tiny rocks which probably come from the asteroid belt.\


Are many times confused with meteors and meteoroids. 

Meteorites are rocks from space that strike the Earth. 

Meteors (also known as shooting stars) are the same kind of object as meteorites, only they are still in space. 

Meteoroids could be tiny particles left behind by a comet or can even be an asteroid. Meteoroids are in orbit around the Sun. 

Meteorites are usually classified as stones, irons or stony irons. 

Have been known to be very large. The Barringer Crater in Arizona (caused by a falling Meteorite) is just over 1/2 miles across and 660 feet deep. 

PICTURES OF METEOR





photos from: google images.
  
that's all for Lesson 1!!  c u on Lesson 2!! 
bubye..!!

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