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Which is the star nearest to earth?
Give the common name for the phenomenon which is the result of sunlight reflecting off the earth and faintly illuminating the darkened portion of the moon?
How big is the universe?
How long is a day on saturn?
What is the part of the sun that we can see without any instruments?
The apparent speed of the sun along the ecliptic is known as?
Describe how are clouds formed?
How many planets are in the new solar system?
In 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?
Sam langley invented what instrument, which allows astronomers to measure the energy output of the sun and other stars?
Tell me how many moons does neptune have?
A meteor that reaches the surface of the earth is more accurately called a?
How many earths can fit into jupiter s great red spot?
What is distance from the earth to the moon?
When was the first american manned space mission to moon begun?
