Entity: QUASAR
A quasar is an extremely luminous active galactic nucleus that produces a large amount of radiation. It is believed to be the oldest and most distant objects ever detected, billions of light-years away from Earth.
QUASAR
Etymology
The word 'quasar' stands for quasi-stellar radio source, named for their starlike appearance.
Definition
A quasar is an extremely luminous active galactic nucleus that produces an extremely large amount of radiation.
Historical Context
Quasars were first noticed in the late 1950s and early 60s, and they are believed to be billions of light-years away from Earth.
Cultural Significance
Quasars have captured the imagination of astronomers and the public alike due to their extreme luminosity and distance.
Related Concepts
Quasi-stellar object, active galactic nucleus, supermassive black hole.
See Also
A compact, starlike celestial body with a power output greater than our entire galaxy, believed to be the oldest and most distant objects ever detected.