Astronomy Question: Download Astronomy PDF

Most astronomers believe that these celestial bodies are at the center of quasars and are the main reason for their large energy emissions:

Black Holes

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If the temperature of a star increases from 10,000K to 30,000K, by what factor will the rate of energy radiated per second increase?	These doughnut shaped zones of atomic particles consists of electrons and protons captured by the Earths magnetic field from the solar winds and are called: