Who is the known as the father of indian astronomy?
How is saturn like earth?
How fast is the solar wind?
Explain how old is this universe?
What moon of neptune orbits in a retrograde direction?
Tell me how many planets are in the new solar system?
Is pluto really a planet?
Which is the brighest star?
What is the density of stars?
Tell me how many moons does jupiter have?
What is the part of the sun that we can see without any instruments?
Astronomers usually detect the electromagnetic emissions of a single neutron star in what single form?
Explain how is venus like earth?
Which are the first soviet us space mission to moon?
What are the only two planets to rotate from east to west?