Overview on Quasars
Coming to Quasars, they are the result of super-massive blackholes, generally from ones at the center of galaxies. When matter gets near massive blackholes, an accretion disc [2] is formed, that eventually heats up and starts radiating. Quasars are one of the most luminous objects in the universe. The radiation from the Quasars manifest as jets that can stretch up to light years.
A Quasar should be continuously fed, otherwise, it will stop radiating. If at all, there isn’t dust and gas to power the blackhole, the quasar becomes quiet. An event, like collision of galaxies may power the Quasar back on.
The center of our galaxy could’ve been a quasar, but it doesn’t have dust and gas to feed on. When eventually, our galaxy collides with Andromeda, the quasar could power back on.
