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Galaxies and Beyond

A quasar is a high-energy sourcespectrumstarsblack holesSelect your answer that is extremely bright and extremely distant. Quasars are approximately the same starssizeenergyoldSelect your answer as the solar system. Their light must travel black holesbillionsstarsspectrumSelect your answer of years to reach Earth. That means quasars are extremely billionsoldstarssizeSelect your answer. The wavelength of light coming from quasars has been transferred to the red end of the sourceenergyspectrumsizeSelect your answer. Quasars might be galaxies in a(n) collideoldinfantHubbleSelect your answer stage. Many astronomers believe that when galaxies collidesourcespectrumsizeSelect your answer they could feed material to supermassive spectrumblack holesstarsenergySelect your answer. These black holes would feast on entire spectrumstarsenergysourceSelect your answer. This would release enormous amounts of energybillionsstarsblack holesSelect your answer. Some photographs from the HubblesourceinfantoldSelect your answer telescope support this hypothesis.