What Is A Quasar?

The sky that we watch every night is full of thousands stars. But in reality, what we see with our naked eye is just a tiny part of the Universe. In reality, the Universe is so big that most of the distant objects are not visible to us. However, certain objects are so powerful that despite their immense distance from us, we are still able to detect them (although only using telescopes). I’m talking about quasars, or “quasi-stellar radio sources”. Do you want to know what they are? Watch this video and I will tell you more!
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The discovery of quasars dates back to the 1950s, and it’s interesting to look at the history of their first observations.
In the 1950s, astronomers started to look at the sky using radio telescopes for the first time. Radio telescopes, contrary to normal telescopes, detect radio waves instead of visible light. When astronomers first started to “watch” the sky with these instruments, they were surprised to find several objects emitting a large amount of radio waves, but almost no visible light. In fact, most of these sources of radio waves did not correspond to any known visible object.
The first quasar ever discovered was 3C 273, a weird name indicating the 273rd object in the Third Cambridge Catalog of Radio Sources (3C). It was discovered thanks to a “lunar occultation”, an event that occurs when the Moon passes between an object and the Earth, hiding the object to our view. In 1959, a group of astronomers at the Cambridge University identified a radio source in the sky (3C 273), but they couldn’t find an optical counterpart to it. Three years later, in 1962, John Bolton and his Caltech radio astronomy group used the Parkes radio telescope to realize a series of observation of the sky during which the Moon was passing in front of the radio source discovered three years earlier. Thanks to these lunar occultations, Bolton and his group were able to calculate the location of the source with precision. And more importantly, they were able to associate it to a visible counterpart, a faint stellar object.
Later on, new quasars were discovered. Generally, their position in the sky matched with very faint objects, like very distant stars: that’s why they were called quasars, a contraction of “quasi-stellar” (star-like) and “radio source”. However, the chemical composition of these objects observed by looking at their spectral lines was very different from any known star. Also, the amount of radiation emitted by them was too large in order to be normal stars.
The observation of these quasars continued throughout the years. By observing their radiation spectrum, scientists found out that these objects were moving very fast and away from the Earth. This could be inferred thanks to a phenomenon known as “redshift”. What is it?
Every object in the sky emits radiation in a broad range of frequencies - and even in the visible part of the spectrum, which consists of different colours: violet, blue, green, yellow, orange and red. The colour that our eye perceives depends on the frequency of the light that we observe: violet corresponds to the highest frequency, while red corresponds to the lowest one. While the light emitted by an object in the sky contains a mix of different frequencies, it has a peak at a certain colour. If we look at the sky, in fact, we notice that some stars appear red, while others appear blue.
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Credits: Ron Miller
Credits: Nasa/Shutterstock/Storyblocks/Elon Musk/SpaceX/Esa
Credits: Flickr
Video Chapters:
00:00 Introduction
00:43 What is a Quasar?
03:06 Redshift
06:31 Quasars and Black Holes
08:17 Observing Quasars
#insanecuriosity #quasars #howtheuniverseworks

[@soulsniper_gamer4371]

6:14 just saved you 13 minutes or 6 minutes

[@TheRealGuywithoutaMustache]

Imagine being able to garner and utilize the energy from these quasars

[@gunnison3681]

Rick Sanchez can

[@joehorne3773]

@@gunnison3681 Pickle Rick!!!

[@w420666]

Type III civilization

[@pythonx9299]

Why do I see this guy everywhere

[@nokia8646]

Dude i was watching fucking greg and you were there how

[@jacobbosley2144]

The irony of time: to us visible light is everything from the beginning of time until it ends, but when the entire expanse of the universe is turned into a life that has a beginning and an end we are in motion observing an otherwise stationary universe.

[@bluemonk44]

I still don't get it and now I'm frustrated because I can't comprehend them. And now I have a headache

[@0mnom]

I understand your comment is 2 years old and perhaps you either won’t see this, or you have already figured out what quasars are… in any case, a quasar is essentially a black hole that is consuming enormous amounts of matter. The matter is falling into the black hole at such speeds and with such friction that it creates a disc surrounding the black hole as well as relativistic jets that shoot out in opposite directions, the (accretion) disc and the jets are the source of an extraordinary amount of radiation, and it is all of this surrounding radiation that makes it a quasar and not just a regular/inactive black hole. Essentially, if you remove all of the matter surrounding a quasar, it just becomes a regular black hole… and on the other hand, if you were to thrust a black hole into a region of stars, dust and gas, it would quickly turn into quasar as it starts to consume its surroundings.

[@bluemonk44]

@@0mnom thanks finally I understand. I took several semesters of astronomy in college and still didn't understand. But thanks now I know

[@pierregregg1798]

oh poor human

[@only1luv]

Ditto yo

[@bon6461]

What part do you not understand?

[@JamesHill-vs4kn]

Thank you for helping us to have a better understanding! We support your work. Thank you again.

[@user-jt6ej7vh2p]

Your voice is very clear and also the contents of these videos. :-)

[@insanecuriosity2682]

Definitely one of our goals! Thanks for watching and your comments!

[@mistyninjax]

Makes me wonder if there is a maximum threshold as to how big galaxies can get.

[@insanecuriosity2682]

Guess we will keep discovering with time, part of the beauty of it!

[@JohnSmith-bw6pv]

depends on how big the super massive black hole is in the center, if our sun was bigger we'd prob have more planets orbiting it@@insanecuriosity2682

[@ahmedsenussi8232]

I love ur videos and commentary u make it just a bit easier to understand thanx please please keep going

[@insanecuriosity2682]

We love putting science and space topic within everyone's reach! Thank you for watching and for the good vibes!

[@barbaradevine2100]

Really mind blowing and the information was understandable.Thank you!

[@nicotesner1957]

How can anyone dislike these videos

[@insanecuriosity2682]

Every head isa different universe! Happy you are in our same one ;) Thanks for watching!

[@timmyarnold1023]

It almost like we are an experiment at Fermilab !!!!

[@LJayyBeh]

The first channel I've seen that ever said the audience can like and or dislike their video. I like that. That alone made me give you a thumbs up.

[@johnconnell8436]

Awesome video. Great simplified explanation. 👍🏻

[@MrBoomer-jl2gw]

Quasars are fascinating. Mind boggling to know that they are the most bright object in the universe and yet theyre undetectable with the naked eye!

[@chrisfreitag7259]

I love how I chose this video first by pure chance. Afterwards saw the vid about quasars from PBS.. 1.5 million views on that one. Honestly I love this one far more lol and you deserve more views.

[@mustaphabiyabi4701]

thank uu , wonderful explantation

[@sciencelovers3345]

Greatly explained

[@amangogna68]

Great video !

[@horizonbrave1533]

Easily the coolest and most bizarre thing in galaxy to me...everybody makes much ado about blackholes... but I swear the quasar and pulsars are where the real jaw dropping stuff is seen xD

[@insanecuriosity2682]

Guess the Universe is big enough for all tastes! Thank you for watching, happy you found your topic!:)

[@lauracarroll3276]

Neat! Red shift idea is cool

[@ecospider5]

Great history about how we understood quasars.

[@vamshimohan.6986]

Good information

[@charlottemaenicolebustaman7130]

quasars are amazing! ❤

[@emmanouilpoursanidis8397]

I like that you give me the option to also dislike your video so i liked it and subbed. Very well done.

[@simateix6262]

Still remember reading a magazine as a kid where there was an article about quazars and we had no idea what are we observing and here we are 15 years later taking pictures of black holes

[@insanecuriosity2682]

Is amazing how much we can know now and how much is yet to discover, great that you've kept your curiosity intact! Thank you for watching !!

[@simateix6262]

@@insanecuriosity2682 agreed. thank you for doing this guys

[@redbugg99]

A quasar is something no one has ever seen but some how it's there ... really

[@larspersson2224]

Got to ask... What is the difference between a black hole and a quasar?

[@Flesh_Wizard]

A quasar is what happens when a black hole is fed too much mass. The material spirals inward, heats up and builds up insane charges, and is spun up into beams from the black hole's poles

[@renatod6527]

125k subs, yet so small views? Great video!

[@insanecuriosity2682]

We like to think we are in constant expanding like the Universe! Thanks for the nice vibes! Great to have you in the community!

[@insanecuriosity2682]

@Hemp Tech Nice said ;)

[@kissthespirits1392]

I synchro summon Shooting Star Quasar Dragon!

[@tonea3126]

Thank u I like it

[@antoniorebelo4318]

E=MC squared. Nothing can escape the event horizon unless its faster than the speed of light. The black hole is literally converting material mass into energy. Black holes are cosmic forces of nature, serving actual function in the formation of galactic filaments, superclusters and galaxies.

[@sushant.280]

These are my most favorite objects in cosmos.❤️

[@jacobblumin4260]

Suggestion: in future videos don't try to explain everything, e.g. a red-shift. Too complicated and detailed for this video. Just refer to other videos on what a red-shift is. Just say that a red-shift tells us how far an object is. Otherwise this is a fine video and thank you for doing it.

[@Teacherkamonde]

Thanks.

[@nestorambriz3570]

We have had Many Years to Improve our Math but yet for some reason we still Rely on OLD theories and have not improved much in our Cosmology!!!!!....I really wonder why??????

[@Dascorpio36]

Do a video of Ton-618 please.

[@isrealprice5340]

Still confused….a Quasar is a super massive black hole with matter spinning around it? And the radiation from the matter that is spit back out into space that creates the light we see is the quasar? Also are they only formed when galaxies collide? And are they at the center of every galaxy since black holes are at the center of every galaxy?

[@JoJ0_07]

Yes & no, the matter that spits out is a part of the quasar. The brightest part of the Quasar is the hot glowing accretion disk made of gas/dust that orbits the spinning supermassive black hole. Almost every galaxy has a supermassive blackhole at the center but not every galaxy is a quasar because you need plenty of gas/dust to orbit the blackhole to make it active thus forming a quasar. A galaxy collision tends to disrupt gas/dust formation in both galaxies which sometimes can get them close enough to the black hole eventually making a quasar out of it. Any supermassive black hole which has matter accreting around it for some time is called an AGN(Active Galactic Nucleus). Quasar is just the most brightest kind of AGN and there are other kinds of AGNs which exist as well :)

[@yungjav]

Holy shit.... all I heard was quasar quasar quasar quasar. Some quasars are known as blazars. Quasar blazar quasar blazars....

[@spaceace3048]

Out of this world entertainment! 👨🏻‍🚀🌌

[@insanecuriosity2682]

That is quite accurate ;) Literally... Hehe thank you for watching and enthusiasm!

[@spaceace3048]

You're very welcome. :)

[@denischarette5898]

I prefer to think of quasars as the final stage of the evolution of a galaxy instead of its initial stage. As the universe expands and galaxies get farther apart, the latter gradually build up a more massive central black hole by attracting more and more gas, stars and remnants of stars in their middle.

[@andreaisonline]

How can Quasars be 20 Billion Light Years away when the Universe is 13.8 billion years old?

[@Sik-Waky]

I think the speed at which the universe is expanding outweighs unfathomable distances. But to be honest I dont know for sure good question

[@DrChaitanyaPlastics]

Because universe is expanding rapidly. That's why radius of observable universe is 46 billion light years.

[@xxflow7453]

Because time is relative to the observer

[@BigNewGames]

Correction sir:, In October of 2019 ALMA Radio Telescope released a Doppler image of the supermassive black hole Sgr A* in the center of our galaxy. The image showed the motion of the gas near the black hole. The red to white colored gas was moving away from us (red shift). The blue to light blue colored gas was moving towards us (blue shift). The darker the color the slower it was moving. The brighter the color the faster the gas was moving. Mind you the shift in the wavelength of light only occurs if the gas is moving towards us or if it is moving away from us. Not if it's motion is relative to us. So behind the black hole we would expect that the gas would be blue, moving towards the black hole relative to us. We would expect the gas between us and the black hole to be shifting into the red because it would be moving towards the black hole and away from us. But the Doppler image posted by ALMA Radio Telescope showed completely the opposite. The red to white colored gas was behind the black hole. Indicating that the gas was moving away from the black hole and us. The closer the gas was to the black hole the faster it was moving away from it relative to us. Energy jets were produced by the black hole on both sides of the black hole. One almost pointing directly at us and the other pointing away from us. Massive amounts of gas and energy were coming from the black hole. The gas was not even orbiting the black hole. It appeared as if the gas was being made by the black hole, radiating away extremely fast from it's surface and then gradually slowing down as it got far away. The red colored gas moving away from us was located behind the black hole and extends away from the black hole for a long distance. X-ray images show these long gas clouds to be emitting massive amounts of radiation as they speed away from the black hole. The black hole is a hot spot of heat and electromagnetic fields moving away from it in all directions. The Doppler image was empirical evidence, actual observations of matter and energy coming from the black hole. The image did not even indicate that the gas was orbiting the black hole in an accretion disk. That was the explanation for all the energy radio telescopes detected coming from the center of the Milky Way and that was incorrect too. It appears that Einstein's field equations are wrong about the gravity of black holes. It appears that nothing is able to fall into them because of the stiff cosmic wind that they spew full of electrically charged particles similar to our sun's solar wind but much more energetic. Looks like we found all that missing energy needed to explain the expansion of space throughout the universe. Would anyone like to see the ALMA radio telescope Doppler image of Sgr A*?

[@TheAlicesmithxo]

What if we are just matter that has been expelled by a quasar and they are so far away from us because we are looking back at our creator? And other universes were expelled from other quasars. And the universe expanding is just us getting further from the quasar source, like the inverse square law.

[@EquazR]

#Quasars

[@genericdragon7260]

It's now called the Hubble-LeMaître Law.

[@sharpknight7026]

Ughhh now i gotta search up whit is a blazar

[@1adamgriffin1]

not one animation of a quasar?

[@benjoel]

Apart from the information, audio editing on this video is top class. Hear with good headphones with spatial sound (Windows 10) on....

[@insanecuriosity2682]

We are definitely in constant improvement! Thanks for the feedback and for watching!

[@dylangabriel6673]

Imagine a quasar the brightness of 10 quadrillion milky ways

[@AaronDanielLIsles]

Quasar. Quasi-stellar objects.

[@RayLiehm]

You have at least one error in this video: at 1:58 the telescope shown is ASKAP (Australian Square Kilometer Array Pathfinder), not Parkes. They're actually really hard to mix up, and were built five decades apart.

[@thegodofmarch2218]

it's a stock video dude

[@thegodofmarch2218]

that has literally no relevance to what this video explains

[@larspersson2224]

To a quote in 'Event horizon'... Do you speak English?'

[@tahamohamad9359]

Our galaxy isn’t 200K light years across. Where are you getting that information?

[@insanecuriosity2682]

The exact number would be 105.700 light years, sorry for the inaccuracy! Thanks for watching and for the feedback, that's how we improve!

[@DrChaitanyaPlastics]

Yes around 100k

[@kevmatteo]

The Milky Way is around 100,000 light years, not 200,000

[@ChrisAnonymous]

You know Quasar spelled backwards is Rasauq?

[@joehorne3773]

they talk of mini black holes ... if small mass is mashed together fast enough.... imagine if you made a mini black hole and had enough matter nearby to keep it alive and growing, enough matter to make it produce a mini gamma beam like like a micro quasar, many uses.... feed it weed... would it shoot out beams of thc from it's north/south poles?

[@NickHey]

If you can't even get a photo of Parkes Radio telescope right, what else in this video is wrong?

[@aliciazigay4510]

Jump to 6:05 for explanation.

[@TheAziz145p]

vsauce :) . yes ?

[@davidunwin7868]

Good explanation in audio but the video imagery is all over the place and doesn't illustrate what's being talked about. For example, Parkes Radio Telescope is not the image shown, and gravitational lensing was shown when you were talking about excretion discs.

[@insanecuriosity2682]

Got it! Thanks for the feedback we will keep improving to get to as less mistakes as possible! Thank you for watching hope to see you soon :)

[@Pike123456]

Milky Way is 100 000 l/y.

[@krii3]

What's the name of the ambient track at 5:30 ?

[@Jay-cn3js]

Sandstorm

[@QuinnIsIn]

How is something 20B light years away when the universe isn't even that old 🤦🏽

[@patrickchapman3242]

Expansion, due to various factors, but primarily dark energy. And that's not saying that an object is 20 billion years old - that's saying that the distance for light to reach it is 20 billion years. It's a fancy unit of distance - similar to mile or km - except that it's used for extremely large distances only. Or you're trolling. I dunno which, yet. lol

[@QuinnIsIn]

@@patrickchapman3242 all i know is the farthest observable light is 13.5 billions lightyears away and that's the cosmic microwave background

[@patrickchapman3242]

@@QuinnIsIn Bruh, the CMB is all over. Like, you're being hit with it as we speak. It expanded and thus increased in wavelength as space expanded. It is across the observable universe - and it's right next to you. And most likely beyond the observable universe (unless we're just a pocket universe, with different physics than outside of it). Still, that doesn't have anything to do with space expanding. Look into dark energy, brotherman. That'll help you, a lot, I think

[@williamkirk1156]

It's a Motorola television! sorry... had to.

[@SenpaiInTheHood]

I love astronomy but I’m not smart enough to pursue it as a career 😭

[@insanecuriosity2682]

Agreed with Hemp, no reason for not getting involve in different ways if it's what you love!! Thank you for watching and hope you stay around with us :)

[@QuinnIsIn]

The universe isn't 20 billion years old bro stop saying that

[@user-xg1dv5qq4s]

WAH AH ABA A BLAC HO VERS A GAMMMA RA BAUST AND QWASA EHHHHHHHHHHHHHHHHHHH!!!!!!!!

[@Amin4831]

What are queefs?

[@SquirrelASMR]

_thirty_ *FIRST!*

[@insanecuriosity2682]

Hi 31st! Aiming to a shorter number next time? Hope so! Thanks for watching!

[@bwmcelya]

Round up all the blazers, pack them close, and call it Fourth-of-July. Fun video. Thanks.

[@user-xg1dv5qq4s]

😆 Lol

[@yakam_dlop.]

1:05 instruments are musical machines not telescopes

[@mothridith9760]

a tool or implement, especially one for delicate or scientific work

[@DendrocnideMoroides]

Binod

[@DaveLL500]

Is a blazar single or double breasted?

[@multiverseandparallelunive6224]

QUASAR VS WHITE HOLE

[@dirremoire]

So, in other words, we haven't a clue what quasars are.

[@TheBrainlessShow100]

How about you go straight to the chase, not waste my time with observation stuff and get your facts right ? (Milky Way diameter is 100k ly)

[@jacksongoddard8964]

Lots of grammatical errors here, and the narrator sounds robotic

[@redbugg99]

If you have never seen a black hole ... just get a mirror and squat .... the same black hole no one has ever seen but it exist

[@nadine6948]

First of all endless you want scary flash backs of you daring your self to do something stupid and gross as a kid only to drop the mirror and become mentally disturbed because you actidenty looked or worst your brain explodes Second of all that's just disturbing And last you see all the way up to your bloody spine and brain along with the cells like stars which is also disturbing

[@redbugg99]

@@nadine6948 only trolls has a KZbin channel that can not be identified..... Are you a legend in your own mind?

[@redbugg99]

@@nadine6948 are you in love with me. I got the filling someone is watching me .... Wow I got a stalker Some how you have managed to comment on my comments Are you subscribed to me .... Wow ... I love you too.

[@nadine6948]

@@redbugg99 well I don't consider myself a troll if you want to see an actual black hole try astral projection you might not get it the first few times but it will come to you on one lucky day

[@muhammadaamirzaman]

I guess Milky Way length is 100000 ly not 200000

[@insanecuriosity2682]

Yes, the right number would be 105.700 light year, sorry for the misleading data! We'll keep working to get to 0 mistakes. Thanks for watching!!

[@nezukot_t7988]

First

[@nezukot_t7988]

@Sassy Sasquack ok² HAHAHHA