Who stated that planets are originated from the collision of the sun and comet?
How many types of galaxies are there?
Of the three types of meteorites, which is the most common, in terms of the number of samples, to fall to earth in recorded history?
How many black holes exist?
What are asteroids like?
Explain how do clouds form?
How many earths can fit into jupiter s great red spot?
Why did you want to become an astronomer?
Explain how big is venus?
Tell me how long is a year on saturn?
Which planet in our solar system has the most circular orbit?
What is the difference between a star, satellite and a planet?
Which king of india built an astronomical observatory in 17th century?
Mars has a thin atmosphere composed mainly of what gas?
An emission or bright line spectrum consists of?
