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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?
139Whos 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
What substance is responsible for neptunes blue-green color?
What is the difference between a star, satellite and a planet?
Explain how does gravity affect life on pluto?
Do galaxies interact?
How big is venus?
Which other galaxy is similar to the milky way?
How many planets are now in the solar system?
What is super galaxy?
How many moons do Saturn planet have?
What are galaxies?
How many moons do mars have?
If gravity only attracts mass and if light does not have mass why does it appear to bend when passing a planet?
What are the only two planets to rotate from east to west?
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?
What are asteroids like?
