Explain how big is the universe?
Did water come from comets?
Does non-carbon based life exist somewhere in the universe?
Describe the atmosphere on Venus, Mar and Jupiter.
Name the part of the sun that we can see without any instruments?
How many stars are there, which are normally visible?
How old is this universe?
Tell me how many moons do mars have?
What are super galaxial nebulae?
Explain how big is venus?
Explain how have some stars had time to die since the universe began?
How many moons do Jupiter planet have?
Why did you want to become an astronomer?
How many half- moons are there in a lunar cycle?
The time taken by aryabhatta for one revolution around the earth?