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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?
111Most astronomers believe that these celestial bodies are at the center of quasars and are the main reason for their large energy emissions?
163Whos book, titled concerning the revolutions of celestial spheres, is considered to mark the birth of modern astronomy?
93If 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
Explain how big is the universe?
A meteor that reaches the surface of the earth is more accurately called?
Explain how was the moon formed?
How many moons does jupiter have?
Explain how have some stars had time to die since the universe began?
The work of this harvard college observatory scientist made possible the first accurate determination of extragalactic distances by what is often called henriettas law?
When was the first american manned space mission to moon begun?
According to keplers third law, plotting the squares of the periods of the planet against the cubes of the semi- major axes of their orbits will result in what sort of graph?
Does astronomy help you with other things in life? If yes, what?
How have some stars had time to die since the universe began?
Astronomers usually detect the electromagnetic emissions of a single neutron star in what single form?
Does astronomy help you with other things in life?
Explain how do clouds form?
How big is the universe?
Tell me how many moons do mars have?
