1. throw some light on indian space programme
2.give reasons to prove that the earth is round in shape
3.what are celestrial bodies ?why are they called so?
4. why do stars seem to twinkle?
5.what is a comet?what is a star?
6.what is a nebula?which heavenly bodies are known as shooting stars?
7.how are the distance of stars measured?what is a light year?
8.name the satelites launched by indian space programme
9.difference between a planet and a satelite
10.what is a orbit?what is a asteroid?