Sam langley invented what instrument, which allows astronomers to measure the energy output of the sun and other stars?
121The hydrogen envelope that surrounds the comets nucleus derives its hydrogen most directly from?
193In the doppler effect, what is the correct term for the change in the color of light when an object that is emitting light is moving toward the observer?
169Which moon is the only other body in our solar system, besides the earth, that has an atmosphere of mostly nitrogen?
142
How old is our earth?
How many types of galaxies are there?
How long is a year on saturn?
Name the part of the sun that we can see without any instruments?
How many moons do mars have?
Explain how far from earth, is the moon?
How many moons do Neptune planet have?
How many black holes exist?
Explain how is saturn like earth?
Tell me how many planets are now in the solar system?
In a search for planet x, this celestial body was found after astronomers had searched for an orbital disturbance of the planet uranus?
What is the speed of solar wind?
In which year was western astronomy included in the indian curriculum?
Tell me how many moons does neptune have?
Which unmanned space vehicle fetched roak pieces from the moon?
