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Who is the known as the father of indian astronomy?
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Name the part of the sun that we can see without any instruments?
The work of this harvard college observatory scientist made possible the first accurate determination of extragalactic distances by what is often called henriettas law?
The magellan clouds are actually what type of celestial body?
What percent of stars in the sky that appear to be single stars are actually binary stars?
Which moon is the only other body in our solar system, besides the earth, that has an atmosphere of mostly nitrogen?
Mars has a thin atmosphere composed mainly of what gas?
Which is the first unmanned space vehicle which landed on the moon?
How do clouds form?
A meteor that reaches the surface of the earth is more accurately called?
Tell me how long is it until our solar system ceases to exist?
When did solar system come into existence? What is the expected life of solar system?
What do astronomers call the point in the sky that is directly overhead?
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