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Sam langley invented what instrument, which allows astronomers to measure the energy output of the sun and other stars?
133The hydrogen envelope that surrounds the comets nucleus derives its hydrogen most directly from?
208In 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?
175Which moon is the only other body in our solar system, besides the earth, that has an atmosphere of mostly nitrogen?
253
How stars produce energy?
Explain how old is this universe?
Which book of aryabhatta is regarded as a great contribution in astronomy?
Explain how does gravity affect life on pluto?
How many types of galaxies are there?
Is the gravitational pull on an object equalized if the object is at the center of a planet, i.e. Surrounded by the mass of the planet, which is creating the gravity?
Explain how big is venus?
What is the density of stars?
How many earths can fit into jupiter s great red spot?
Tell me how many earths can fit into jupiter s great red spot?
Maria on the moon are?
What is the thinnest layer of the suns atmosphere?
Which is the landing craft used by armstrong on the moon?
How were the earth, sun and moon formed?
Explain how far from earth, is the moon?
