What is a Quasar?


Do you ever wondered, whether all those things that twinkles in the sky are stars?
well, twinkling is not just for stars. There are some far more interesting space objects that live under the mask of a star, and you can never distinguish them from stars unless your telescope is made to detect infrared radiation.

Quasars, this is what they--good scientists :-)--named them as they are quasi-stellar radio sources.

Quasar actually is a compact object like star rather than a expanded one like galaxy, surrounding a super massive black hole that lie at the center of a super massive galaxy. This super massive black hole in fact is responsible for all the power it is exhibiting.

They are by far the most luminous, most powerful and most energetic objects in the universe.
The energy they emit is in the range of about 1000 times that of the galaxies they inhabit in. They even show the heavy red shift (if a light source accelerates away from us, it appears more and more red) from earth, and that means they are moving faster away from earth and when combined with Hubble's law (galaxies tend to move away from each other with a velocity proportional to their distance) it shows that they are very very far from earth, and if this is the case, it can also implies that they are formed much early in the universe(as they traveled a lot of distance so far)

There are some very high radiating quasars in our known universe and their radiation almost equals trillion sun's--may be that's why they stay far away or is it the other way around. :-)

There is even a possibility that our Milky Way was once a quasar(according to NASA), may be because they didn't found any quasar at its center surrounding the massive black hole ;). The question is if it was once a quasar, what happened to the galaxy it was once surrounded by?

Check the video below to know how a quasar looks like:

Comments

35 Responses to “What is a Quasar?”

Anonymous said...
July 1, 2011 at 12:37 PM

It is just conjecture on my part but is it possible that a Quasar may be the result of a stellar size black hole that radically transformed into a super-massive black hole? And, again, the Quasar is the precursor of the beginnings of a galaxy? I think the first stellar objects in the early Universe where massive stars (many times more massive than the biggest hyper-giants), and when they reached the end of their life they transformed into oversized stellar black holes. Because the early Universe had a larger volume of gas clouds and dust around these stellar black holes, they began feeding at a quickened paced, and this may have caused a sudden burst of emitting energy know today as a Quasar. I think also the transformation to a super-massive black hole from a big stellar sized one came some time after the Quasar came to life as the black hole was still actively feeding. This is just an idea. Feedback anyone? Eric

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Anonymous said...
February 11, 2012 at 6:02 PM

well hi i want to know if this is true but i once heard that a quasar is a black hole with the power of 10 billion black holes

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Did u hear that off of futurama

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Anonymous said...
June 20, 2013 at 11:32 AM

ACTUALLY!!!The first and third answers are correct in a way.
We now know that Quasars are very distant galaxies with a hyper-massive black hole at it's core(Sometimes two:OJ 287,SDSS J1254+0846
ECT...).These Black holes feed to the extreme!
Hundreds of earth's worth of material a year for
decades.Maybe even centuries.This causes a very
bright accretion disk and jets that can be seen across the galaxy.
The masses of quasars are probably in the hundreds of billions up to Thousands of billions
in range.
Any questions feel free
to ask me on this site.

BOBBY



range

Max Jason said...
June 29, 2013 at 1:09 AM

Its good to hear that its help to know about early stage of universe.. Hmm explaining red shift is gud.. I like to know abt universe.

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