Explain the moon?
Why countdown while firing a aeroplane?
Explain shape of the earth?
how stars comes from different sizes
What is astronomical telescope?
In universe there exist temperature of 1000000 degree Centigrade, does there also exist the temperature of -1000000 degree centigrade ?? (in order to satisfy newton's second law)
What is solar eclipse?
What is the distance of the earth from the moon and the sun?
What is eclipses?
Explain the planets?
What is the magnetic effect of the earth?
What is equatorial and polar diameter?
What is lunar eclipse?
What are the stars?
What are the forces which keep a flying plane in a equilibrium?