Friday, October 24, 2008

Twinkle twinkle...

Twinkle twinkle little star is a famous rhymes that every kid in the world knows. Have you ever thought why is it stars that blink and not planets?
The stars twinkle because the light of the stars has to travel a longer path through a thick layer of atmosphere and thus there are more chances to get disturbed. You can also notice that at times the stars twinkle more than normal twinkles they do. This is because at times, the atmosphere is not still as there are lot of variations and disturbances takes place with respect to the temperature and pressure of the atmosphere.
On the other hand, planets do not twinkle but shine steadily. This is because of the same above stated reasons.
If you can make the longest ladder in earth and get out of atmosphere where there are no disturbances at all, then you can see the non-twinkling stars.
Want to try?

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