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What term is most commonly used to refer to the actual motion that stars have in relation to each other, and over many years will lead to changes in the shapes of constellations?
106Most astronomers believe that these celestial bodies are at the center of quasars and are the main reason for their large energy emissions?
131Whos book, titled concerning the revolutions of celestial spheres, is considered to mark the birth of modern astronomy?
87If the temperature of a star increases from 10,000k to 30,000k, by what factor will the rate of energy radiated per second increase?
114
Which is largest and most massive star?
Tell me how many moons does neptune have?
What is the speed of solar wind?
When did the challenger return to the earth after its first mission?
Explain the venus atmosphere.
Which is the only star of the milky way galaxy?
Describe how are clouds formed?
Which is the landing craft used by armstrong on the moon?
What are gamma ray bursts?
Tell me how many moons does saturn have?
How fast is the solar wind?
A meteor that reaches the surface of the earth is more accurately called a?
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?
How many stars are there in the whole universe?
The first man who walked on the moon?
