Monday, November 15, 2010

World Between Me News

Something about the Stars....

We may all have a slice of knowledge of what stars are, but do we actually know a lot about them?
I have been reading a science magazine in my dentist's waiting room lately  ( not that I am a big fan of science, but when I have a chance, I read about what's going on up there in the sky). While running through the magazine I discovered few facts about stars. Here is a bunch of facts about them....

Stars are huge balls of gas in outer space. They are made from helium, hydrogen and other elements, they produce heat, light and other forms of energy. The twinkling stars that you observe in the night sky are actually very far away from the earth. Our Sun is also a star, but it is much closer to our planet, Earth, therefore it looks much bigger.

The Sun has planets and other objects moving around it. The Solar System is made of our Sun, Earth, other surrounding planets and rocky objects all together. Many stars have planets moving around them too.

It is believed by astronomers that there might be approximately  70,000,000,000,000,000,000,000 or 70 sextillion stars in the Universe. But when you look at the sky, you may see 3,000 with your naked eye. 

The poetry “twinkle twinkle little star” must have been inspired by those beautiful stars twinkling in the night sky. But have you ever wondered why stars twinkle at night? The twinkling of stars is actually caused by the movement of Earth’s atmosphere. The light emitted by the star enters the atmosphere in a straight path, but we see stars twinkling because air movements in our atmosphere change the paths constantly, hence the twinkling.

Stars come in different sizes. Some are smaller than our Sun whereas others are so huge that our sun is a mere dot when compared with their size. Some stars, called supergiants have a radius of about a thousand times that of our sun. The smallest stars are called neutron stars.

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