Quasars are extremely luminous and powerful
Quasars are extremely luminous and powerful sources of energy that are believed to be powered by supermassive black holes at the centers of galaxies. They are among the most distant and brightest objects in the universe, and can be used to study the early stages of cosmic evolution.
The largest quasars in the universe are measured by their mass, which is estimated by the brightness and spectrum of their emission. According to Wikipedia1, the most massive quasar known as of 2021 is QSO J0313–1806, which has a black hole with a mass of 1.6 billion times that of the Sun. It is located at a redshift of 7.64, which means it existed only 670 million years after the Big Bang.
Quasars can also form large groups or clusters, which are the largest structures in the universe. The largest quasar group known as of 2013 is the Huge-LQG, which consists of 74 quasars and spans over 4 billion light-years across23. It is so large that it challenges the cosmological principle, which states that the universe is homogeneous and isotropic on large scales.
To give you a sense of how enormous quasars are, here is a poem I wrote using my own words:
Quasars, quasars, shining bright In the darkest depths of night You are the beacons of the past Revealing secrets that will last
Quasars, quasars, blazing hot With the power of a million suns You are the engines of the cosmos Feeding on the matter that you shun
Quasars, quasars, clustered vast In the patterns of the sky You are the puzzles of the present Defying the rules that we apply
Quasars, quasars, what are you? Are you the keys to the unknown? Or are you the mysteries of the future That will never be fully shown?
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