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The newfound LQC is composed of 73 quasars and spans about 1.6 billion light-years in most directions, though it is 4 billion light-years across at its widest point. To put that mind-boggling size into perspective, the disk of the Milky Way galaxy â home of Earth's solar system â is about 100,000 light-years wide.
Answer Wiki. A Quasar is a compact region surrounding a supermassive black hole and emitting enormous amounts of electromagnetic energy as mass from the core of a surrounding galaxy, under the influence of the black hole's gravity, falls onto its accretion disc.