What exactly is a quasar?

Question

I know that it is a point of extreme emission of light, but what exactly causes it, and what is being let off?

Answer 1

Quasar's are believed to be super massive black holes that emit a lot of electromagnetic radiation because they take in so much material around them.

Answer 2

A quasar (contraction of QUASi-stellAR radio source) is an astronomical source of electromagnetic energy, including light, which shows a very high redshift. The scientific consensus is that this high redshift is the result of Hubble's law. This implies that quasars are very distant. To be observable at that distance, the energy output of quasars must dwarf that of almost every known astrophysical phenomenon with the exception of comparatively short-lived supernovae and gamma-ray bursts. They may readily release energy in levels equal to the output of hundreds of average galaxies combined.

In optical telescopes, most quasars look like single points of light (i.e. point source) although some are seen to be the centers of active galaxies.

Some quasars display rapid changes in luminosity, which implies that they are small (an object cannot change faster than the time it takes light to travel from one end to the other; but see quasar J1819+3845 for another explanation). The highest redshift currently known for a quasar is 6.4. [1]

Quasars are believed to be powered by accretion of material onto supermassive black holes in the nuclei of distant galaxies, making these luminous versions of the general class of objects known as active galaxies. No other currently known mechanism appears able to explain the vast energy output and rapid variability.

Knowledge of quasars is advancing rapidly. As recently as the 1990's there was no clear consensus as to their origin.

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Answer 3

"Quasar" stands for "Quasi-Stellar", and is used for objects seen with a telescope that look like a star, but which have other attributes that make it like no ordinary star. For instance, the distance to the object would be estimated via its apparent red-shift, and would turn out to be large, so large that the apparent brightness as seen with the telescope would mean that it was putting out more energy than a million normal stars.
As to how such an energy emission might be possible, all possibilities are ransacked. For instance, staring up the exhaust of an alien's rocket engine?

Answer 4

A quasar (contraction of QUASi-stellAR radio source) is an astronomical source of electromagnetic power, alongside with easy, which exhibits an extremely severe redshift. The scientific consensus is this severe redshift is the effects of Hubble's regulation. this suggests that quasars are very distant. To be observable at that distance, the ability output of quasars might desire to dwarf that of tremendously much each prevalent astrophysical phenomenon apart from incredibly short-lived supernovae and gamma-ray bursts. they might extremely merely launch power in levels equivalent to the output of hundreds of straightforward galaxies blended. In optical telescopes, maximum quasars look like single factors of sunshine (i.e. factor source) even even with the undeniable fact that some are considered to be the centers of lively galaxies. some quasars reveal speedy adjustments in luminosity, meaning that they are small (an merchandise can not replace speedier than the time it takes easy to trip from one end to the different; yet see quasar Jc4ca4238a0b92382dcc509a6f75849b8c4ca4238a0b92382dcc509a6f75849b9+3845 for yet another clarification). the optimal redshift at the instant prevalent for a quasar is 6.4. [a million] Quasars are believed to be powered with the help of accretion of cloth onto supermassive black holes interior the nuclei of distant galaxies, making those luminous variations of the prevalent class of goods prevalent as lively galaxies. No different at the instant prevalent mechanism looks waiting to describe the vast power output and speedy variability. understanding of quasars is advancing immediately. As these days through fact the c4ca4238a0b92382dcc509a6f75849b990's there become no sparkling consensus as to their beginning place. you ought to get greater advice from the link under...

Answer 5

The important point to know is that when material falls into a black hole, it gives up a significant amount of its mass as energy which is radiated to the environment. The conversion efficiency of mass to energy is much higher than in normal nuclear reactions.

Quasi-stellar radiation sources are believed to be very young galaxies with lots of material near their core feeding a super-massive central black hole. The radiation released is so intense it tends to drowned out the rest of the galaxy in photographs.

Answer 6

A quasar is also a pulsar - a rapidly spinning neutron star. We detect x-ray radiation every time it makes one revolution, hence pulse-ar. They are so massive and dense that they can have a spin rate up to several times a second.

Answer 7

It is the farthest thing we can detect. It can be up to a trillion times as strong as the sun. That's all I know.

Answer 8

let me check... uh, the very bright center of a distant galaxy in my 6th grade textbook lol

Answer 9

its the muslim holy book