Stars burn for anything from a few million to tens of billions of years. The nearest star, apart from the Sun, is approximately over 40 trillion km away! (WOW!) They are all so distant that we can see stars only as pinpoints of light in the night sky.
- Do you know where are stars born?
Stretched throughout the space are actually vast clouds of dust and gas which are called nebulae. These clouds are 99% hydrogen and helium with tiny amounts of other gases and minute quantities of icy, cosmic dust. Stars are born in the biggest of these nebulae which are called giant molecular clouds. At this place, temperatures plunge to -263 degrees! Although these nebulae are think and cold, they contain all the materials needed to make a star.
- Formation of Star
* Interesting facts!
It is quite hard to know how many stars in the universe, for the vast majority of them are much too far away to see. But astronomers guess that there are about 200 billion billion!- Do you know what are constellation?
Constellations are small patterns of stars in the sky, each with its own name. They have no real existence, but they help astronomers locate things in the night sky.
- Do you know how hot are the stars?
The surface temperature of the coolest stars is below 3500 degree celsius while the brightest star is over 40000 degree celsius! (OH MY GOD......! I'M BURNING!)
The biggest star in the universe is the supergiant. Antares is 700 times as big as the Sun. There may be a star in the Epsilon system in the constellation of Auriga that is 3 billion km across - 4000 times as big as the Sun! (WOW!)
Here is an video which may be useful to you in understanding the formation of stars. Enjoy!
- DISCUSSION TIME!
Here, you can voice out your thoughts or comments on the topic and we will discuss in this blog post.
Today's discussion:
Do you think stars are important and essential to our life? Why?
Should you have any comments to voice out, please type in the comment box.
Thanks.
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