Quasars are thought to be galactic black holes which are releasing focused energy from an accretion disk. The temperature could be as high as hundreds of millions of kelvins, but is detected due to its extremely high luminosity.
Quasars still exist.
No. Quasars are at the centers of distant galaxies.
Scientists use radio waves to study distant quasars because quasars emit large amounts of radio waves but not much visible light.
Quasars are the unusual type of active galaxy in the universe.
Yes they are. Thanks mainly to the Sloan Digital Sky Survey, more than 200,000 quasars are known.
Quasars still exist.
quasars
No. Quasars are at the centers of distant galaxies.
Quasars are thought to be distant super-massive black holes.
The first quasars were discovered in the 1950's
Yes. Quasars are the size of the solar system.
Quasars do not have galaxies in them, quasars are at the hearts of galaxies. All quasars are located in galaxies, as a quasar involves massive amounts of material falling into a supermassiv black hole. Neither of these can be found outside of a galaxy.
Scientists use radio waves to study distant quasars because quasars emit large amounts of radio waves but not much visible light.
pulsar and quasars
Not entirely - although it is believed that quasars are caused by a gigantic black hole.
Quasars are the unusual type of active galaxy in the universe.
Quasars are related to supermassive black holes in the center of galaxies.