A celestial object that emits intense radiation and is thought to be a distant galaxy with a massive black hole at its center.
From the acronym for quasi-stellar radio source, first used in the 1960s to describe these objects.
- Quasars are some of the most distant and most luminous objects in the universe.
- The quasar's intense radiation is thought to be caused by matter falling into its massive black hole.
- Scientists have used quasars to study the early universe and the nature of space and time.
- The quasar's light has taken billions of years to reach us, allowing us to see deep into the past.
- Some scientists believe that quasars may be the cores of young galaxies in the process of forming.