What is the weight of the earth?
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What are the forces which keep a flying plane in a equilibrium?
Equatorial and polar diameter.
What is the sun?
in which direction the earth rotate around it's axis
why we feel sky blue in color
What is astronomical telescope?
Explain the moon?
What is the weight of the earth?
What is the distance of the earth from the moon and the sun?
Explain shape of the earth?
Who discovered Proton?
brief notes on The Moon