Tuesday, May 25, 2010

THE SOLAR SYSTEM

Posted by Louisa at 4:29 AM



I was doing my laundry and when I wanted to put my clothes

for drying, it was raining and I thought : let's wait till its SUNNY.
The Sun is the star at the center of the Solar System. It is also in Milky Way. It has a diameter of about 1,392,000 kilometers , and its mass is about 2 × 1030 kilograms, accounts for about 99.86% of the total mass of the Solar System. About three-quarters of the Sun's mass consists of hydrogen, while the rest is mostly helium. Less than 2% consists of other elements, including iron, oxygen, carbon, neon, and others.

The sun produces temperatures and densities in its core great enough to sustain nuclear fusion, which releases enormous amounts of energy, mostly radiated into space aselectromagnetic radiation, peaking in the 400–to–700 nm band we call visible light.

THE SOLAR SYSTEM formed from the collapse of a giant molecular cloud approximately 4.6 billion years ago. Eight solitary planets orbit The Sun are nearly circle and lie within a nearly flat disc known as eclipse. The four smaller inner planets, Mercury, Venus,Earth and Mars, also called the terrestrial planets, are primarily composed of rock and metal. The four outer planets, Jupiter, Saturn, Uranus and Neptune, also called the gas giants, are composed largely of hydrogen and helium and are far more massive than the terrestrials.

Asteroids are mostly small Solar System bodies composed mainly of refractory rocky and metallic minerals that surrounds the Sun. Asteroids are also sometimes called small planets or planetoids. They are smaller, but larger than meteoroids.

The Solar System is just one of the system in universe known to human. There are so much more systems in Universe yet to be discovered. I'm amazed at how huge is this world to sustain such a large population. But, out on the space, it is thousand times larger than our earth planet, and it sustains more living than we can ever imagine.

Space is such a wonder..

for extra knowledge on solar system:
-www.solarviews.com/eng/homepage.htm
-science.nationalgeographic.com/science/.../solar-system-gallery/


 

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