As the technology evolved, the Hubble Space Telescope captured many high-resolution images of quasars. When they were identified in photographic images at visible wavelengths, they appeared as faint star-like points of light. The first quasars were identified in the 1950s as sources of radio-wave emission of unknown origin. Quasars were identified relatively recent and our journey of understanding them has just begun. It is possible that when the Andromeda and Milky Way galaxies collide, the supermassive black holes will merge and create a new quasar.

This occurred in a period of violent star formation and as such, helped to quell it down. Hot gas cannot collapse and form new stars. They decreased the active star formation by heating up gas. Quasars played a great role in the shaping of the Universe.These supermassive black holes are surrounded by a solar system-sized whirlpool of superheated plasma which shines brighter than entire galaxies.Usually, the supermassive black holes behind quasars have millions to billions of times the mass of our Sun.Quasars emit energy levels of around millions, billions, or even trillions of electron volts.This makes them the most distant objects to be discovered. Most of the discovered quasars are billions of light-years away from us.There is a supermassive black hole behind every Quasar, but not every black hole is a quasar.Because of this, they are visible from incredibly long distances and as such, are among the brightest objects in the universe. Many of the charged particles inside the quasar jets reach speeds that are very near the speed of light.Around 10% of the known quasars emit strong radio waves.The first was discovered in 1950, and it was named 3C 273. More than 200.000 Quasars have been discovered.Because of their great brightness, they tend to outshine the ancient galaxies in which they reside.Most Quasars are at least 100 times more luminous than our Milky Way galaxy.They stand for Quasi-Stellar Radio Sources. Quasars belong to a family of objects known as active galactic nuclei or AGN.The light emitted comes from the accretion disk around supermassive black holes. Quasars are the brightest and most distant recorded objects in the visible Universe.

Quasar outer space phenomena