Quasars are an astronomical phenomenon that radiates huge amount of electromagnetic energy. Most of them are a long way away from us, implying that they formed near the beginning of the universe, and have since moved away.
I’m not sure we know exactly what they are, but I think we believe they are formed by the collapse of huge volumes of material into super-massive black holes. As the material comes together before reaching the black hole, it releases huge amount of energy.
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