Explain how do clouds form?
How big is venus?
Does time stop at an event horizon?
Astronomers usually detect the electromagnetic emissions of a single neutron star in what single form?
How old is this universe?
The celestial coordinate analogous to latitude is called?
Which star is called the polaris?
Explain how far away from earth, is space?
What are the scientific names for the two regions of a sunspot?
How can space expand faster than the speed of light?
What are galaxies?
Which is the first unmanned space vehicle which landed on the moon?
When did solar system come into existence? What is the expected life of solar system?
Who is the known as the father of indian astronomy?
Explain how was the moon formed?