The Formation of the Milky Way Galaxy

Now that we've learned about the first ten billion years in the development of the universe, it's time to get a little more specific to our own species. We live in a galaxy called The Milky Way. When did it form, and how? Where is it located in the universe? Let's take a look!
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[@attackanddestroy]

Dude, your content is stellar!

[@DevastateOne]

Or is it inter-stellar? Lol 😜

[@jaketheperson8495]

@@DevastateOne shut up

[@arcticjackw]

Bro, it’s out of this world

[@SamuelTrademarked]

Take my like and get out

[@PunmasterSTP]

I’m really glad I found the puns in this little conversation. I feel like we may form a…local group.

[@xpiratea]

My only favourite teacher in this entire universe..... I understand everything by listing it once and my school knowledge takes about 2 to 5 readings, thank you to let me imagine and learn about the universe 🌟🌟🌟

[@jonahhenry846]

So I love the videos, but the rotation curve of the milky way definitely does not decrease with increasing radius but rather remains relatively flat with increasing radius. This is both incredibly interesting and important, as it's this fact that led to the idea of dark matter halos around galaxies. The spiral arms are therefore not a result of varying velocities but rather varying orbital precessions of the stars, and as such are density waves that rotate much slower than the average star does.

[@bensplace]

I came to the comments to post this same thing.

[@simplegoeasy8236]

Most of your video's content is very interesting and informative. Some are even better than most of the textbook descriptions. Thank you for your sharing, it really helped!

[@lynnlynn1317]

kzbin.info/www/bejne/kJqziXevmptmeMU👍👍

[@laurelcook9078]

My brain cannot comprehend how big space is. Like I’m disgusted by how chill I am, I should be freaking tf out but my anxiety meds prevent that. I used to have panic attacks about the scary size of outer space as a kid. 😂

[@danielparsons2859]

Beautifully explained. No hyperbole only good scientific information.

[@PunmasterSTP]

Formation of the Milky Way? More like “I’m really glad I could watch Professor Dave today!” Keep up the amazing work.

[@Jetwill99]

Did anyone else catch themselves being proud that the Milkyway is it’s own Galaxy and not some loser satellite Galaxy

[@deathechovii]

I'll see you in 4 Billion years

[@deathechovii]

@@candybuilds2862 who claims I will not be?

[@buggy___o1496]

@@candybuilds2862 it is a joke smh

[@chxrrycqxes2294]

@@candybuilds2862 your one of those stupid clout chasers in the comments that be like roah to 100k with no videos so just stop those are just little clout chasers

[@zxwofficialyt8979]

Yeah

[@gaodacheese4691]

see you too, can't wait

[@varshadeotare4644]

Your intro is amazing

[@ASCENSiON1989]

I always crack up a smile at the ending "hmmm".

[@carinewlimits]

anonymous panda fr

[@Kenshin6321]

It's almost a shame this stuff takes billions of years. No one alive today will ever see any of this into completion. It's actually kind of sad.

[@ProfessorDaveExplains]

But we have and do, galaxies exist.

[@coterohe]

I have a question (I know nothing about this, just curious), if there’s a supermassive black hole at the center of our galaxy, does that mean we’re being dragged by the gravitational force of it? In that case, we’re gonna get sucked by that black hole eventually?

[@pottupatteri2903]

Some stars might get dragged into it, but not likely. It works just like how our own Earth stays in orbit around the Sun, without being pulled into the Sun.

[@rporta]

we are lightyears away from it

[@vladimirtiffany]

blackholes dont even make up 0.1% of the mass of the galaxy

[@csch1899]

Just 2 days ago we made the first photographs of a blackhole in the center of milky way!

[@nickolas240]

I've heard somewhere that black holes actually help galaxies to form

[@tim59ism]

I wish I was a spaceman..the fastest guy alive..I'd fly around the universe, in Fireball X L 5 !Ooops... back to my childhood, there. Very nice explanation, thank you.

[@amoore1001]

it is so astonishingly informative,,, thank you,,,

[@skywalkerneoblade]

Well delivered and to the point. Have an updoot.

[@norawallberg1345]

Great explained. Real information and not exaggerations as opposed to many other space videos. 👍🏼

[@nicerice8293]

HEY YOU GOT A HEART BY HIM AND NOT ME

[@LovexLove.]

I think we should make a game plan about that galaxy collision ahead of time.

[@rheiagreenland4714]

It's not really a collision though, the only bodies that usually collide are the two central black holes. Since galaxies are almost entirely empty space. The only game plan that we might need is to avoid being flung outside the galaxy or too close to a star that would be about to go supernova Besides it's billions of years off anyways

[@harishravishankar]

Stunning..

[@omegasteve8485]

I wish that our atmostsphere didnt change the colors of stars the night sky would be so colorful

[@michealtaylor7745]

What do you mean?' We see blue, white, yellow orange & red stars from earth with our eyes, Bins or scopes. Our atmosphere has no affect on a stars colour, or stopping us seeing what colour the stars are.

[@raoras1104]

Wish you're my professor at school.. Love your vedio so much

[@faizangigani9419]

You are amazing

[@abhishekgujjar9078]

Awesome explanation

[@anilmandi6716]

In one word you are awesome bro

[@amehak1922]

There are well defined edge: the energy barrier around the galaxy edge and one around the core. The enterprise will enter them in 2266 and 2285 respectively.

[@Alitheone6618]

How did we get stuck with a silly name like 'Milky way'. I mean come on science! Also, loving your content man. Keep it up and good luck!

[@Alitheone6618]

Also wouldn't a name like 'The Andromeda-way' be better than 'Milkdromeda'

[@Human-gu2cx]

Ali Selebi it should be called “beeg star boy”

[@sphynx7242]

the name comes from a Greek myth, idk which one

[@Alitheone6618]

@@Human-gu2cx Lol

[@manw3bttcks]

When you actually get a degree in astronomy, they usually just call it "The Galaxy"

[@borderbopperary]

This video helped me with a project lol

[@yoelsunam]

So fascinating. How can it be so profound and amazing? I think there is a superpower behind all these otherwise it wouldn't be so beautiful and precise by chance.

[@morestuff64058]

that's cool and youre my faviroute teacher

[@lddchannel8657]

Wow..Many stars.

[@janduplessis3901]

Afraid the 200km per second speed of outer edge star to go once around does not jibe. It will take light at c 332 955 years to do 1 rotation, radius of milky way being 52 850 light-years. If given time of 250 million years is correct, then star goes around roughly 750,8 times slower than c, in other words at 399,6 km per sec. Very much faster ie double the measly 200kmpsec given in your thumbnail. The other possibility of course is that that speed is correct, but then round trip time calculates to 5 x10E8 years, or 500 million years. (200×60×60×24×365.25 = 6.31 x 10E9 km/year. 1 lightyear = 9.461 x10E12, giving perimeter of 3.15 x 10E18 for outer rim. Divide the 2 gives answer of 500 million years) Would really love to know which of these 2 outcomes reflect reality. I suspect correct rotation time, meaning milky way has only spun fully round 54 times since formation. A slow galactic whirling dervish.

[@Jessica-jn4tj]

This is just great.- well said. I like the fact you put this on u-tube

[@NathanHarrison7]

Another excellent video. Thank you so very much.

[@Sir_Gugharde_Wuglis]

The disk is 1000lys thick. What makes it that thick? Stars or gas and dusk, with stars a thinner inner disk?

[@Nikk82115]

Awesome video! So is all the bright light emanating from the center clusters of stars?

[@fungidragon7494]

Most of the light that comes from the centre of our galaxy or any Galaxy is formed just because of how much heat is created when something is spinning around a black hole

[@Nikk82115]

@@fungidragon7494 That does make alot of sense! Thank you. ☄

[@michealtaylor7745]

Most all of the light from the centre is from individual stars that are so close to eachother, unlike where the sun is. Stars at the centre are light weeks away from eachother not yrs. Hence its so bright. We can't see the central supermassive black hole,' but we do detect its influence on everything.

[@maple7093]

"It's professor Dave, want a milky way?"

[@michaelpolifka10]

Will we ever have the technology to explore all of the Milky Way in person?

[@xbumpa]

If we stay on earth I don’t see that happening

[@samrowe2889]

No

[@Evolcun]

Maybe

[@michealtaylor7745]

Most deffinately not. If you knew how big our gallaxy is & the space it entails, you'd realise no one could ever visit through the whole gallaxy.

[@MrRahman19]

Hi Pro. How you can prove the Bingbang theory which happened 5,000,000,000 years ago (earth or light year)? and how you can prove the formation of our galaxy why it condence to a disc and not sphare? and why all Galaxies have the disc shape?

[@ProfessorDaveExplains]

Please watch this astronomy playlist from the beginning.

[@jaydeevaldez9934]

The Big Bang happened 13.8 billion years ago, not 5 billion. There is a whole lot of evidence for the Big Bang. The Milky Way formed as a disc and not as a sphere is because the primordial cloud of gas and dust upon which it formed has a consistent angular momentum, which forms an irregular galaxy first before becoming a disc. It is similar as to why water forms a spinning whirlpool on a sink. The galaxy forms spiral arms as stars tug each other with gravity creating a wave-like pattern similar to traffic of vehicles in a road. This permeates throughout the galaxy and we see this as an arm. Note that some galaxies do form spherical shapes, and they are elliptical galaxies. They are more advanced stages in galactic evolution as they are the result of mergers of galaxies in clusters, which are chaotic.

[@michealtaylor7745]

All gallaxies don't have a disk shape as you call it. There are Spiral, Barred spiral, Lenticular, eliptical & irregular shaped gallaxies. We live in a barred spiral.

[@roccodonato6236]

Does anyone else remember when we were in the Sagittarius arm and not the Orion arm? You're probably over 40 if you do.

[@leonbuzza]

If every galaxy is centred with a black hole does that mean everything is getting sucked into it? Like a sink when the water swirls around it. So everything that it towards the centre of the galaxy were once on the outside. Our solar sytem is slowly getting sucked into the centre?

[@ProfessorDaveExplains]

Well some supermassive black holes have an accretion disk of gas that is getting sucked in, but that's about it. Anything in a stable orbit, like most of the galaxy, is not getting sucked in.

[@elijahdick9568]

Nothing gets "sucked" into a black hole, things fall into it. A black hole is a gravitational center, like any other celestial body, so matter can always find a stable orbit around it.

[@michealtaylor7745]

Supermassive black holes created the gallaxies, from the inside out. They determine when & where star formation will take place in the gallaxy.

[@JHawed865]

I'm glad that before the blackhole will totally flushed-in us our sun died we're already gone and the anxiety is real out of this entire galactic rap god!

[@vxllve_]

Flexing so hard cuz I belong to the second largest galaxy of our local group 🕺

[@ilikeexxs]

Why the heck is it "Milkdromeda?" And not "The Andromedy Way?"

[@michealtaylor7745]

Esp as Andromeda is twice as large as the Milky Way.

[@nadirmahfoudh1812]

Very interesting indeed

[@LadyDoomsinger]

"Local Group" "Milkdromeda" Sooner or later you run out of mythological figures to name things after, I suppose.

[@wildstarfish3786]

weren't most of those mythological figures thought to have become the things they're named after?

[@LadyDoomsinger]

@@wildstarfish3786 Perhaps. It's hard to say whether people of the past literally believed what they saw in the sky was their various mythological figures, or it was just meant as symbolism all along. However, only the planets and celestial phenomena that are visible to the naked eye were named by those people; planets like Neptune and Pluto were only discovered after the invention of the telescope, but were named in the same tradition as the other planets.

[@ImPoPzzZ]

@@LadyDoomsinger Im from greece and i still don't get why all of our planets are named after greek gods i don't think people were actually thinking those were actual gods i think its just a reference after all the gods didn't live in space they lived in Mount Olympus (supposedly)

[@LadyDoomsinger]

@@ImPoPzzZ It sounded cool. It doesn't have to be complicated. "Local Group" does *not* sound cool.

[@MitsukiDiablew]

@@ImPoPzzZ Well, the planets are named after Roman gods, not Greek. Although, they are the same gods as the Greek mythology ones but with different names and traits.

[@dennisaustin3709]

I have a question if a Black Hole was approaching a star just as it went supernova would the force the star explodes be strong enough to push The Black Hole back?

[@hunglikeahorse120]

My guess would be no. From my understanding (which isn’t nearly as good as Dave’s) would be that the black hole has such strong gravitational forces that it would consume all of the energy and matter that the supernova is putting out. Remember that the gravitational force of a black hole is so strong that light cannot escape also that the mass of a black hole is unbelievably immense. Knowing that, I would say that it’s similar to taking a very strong vacuum and popping a balloon near the intake. Everything just gets sucked in with no consequence to the black hole. Then again I could be completely wrong because I don’t know enough about astronomy to know if that is what would really happen. Just going off of what little I know.

[@markarcillas3574]

How many years it took to form galexy?

[@lissell]

My son loves the milkdromeda 😊😊😊

[@omkartikekar6016]

His intro is awsome. Who else listen his intro many times before going to actual comment. Pls like

[@jyegovan-smith4111]

Cool!

[@unaizaiqbal5343]

“The heavens and earth were ˹once˺ one mass then We split them apart. And We created from water every living thing. Will they not then believe?” - Qur’an (21:30)

[@americansmoke3551]

I just want to see where we are located in the Galaxy.

[@Ihab.A]

I have always wondered about the term GAS AND DUST. What exactly is DUST? I'm almost sure it isn't the dust we are familiar with right?

[@ProfessorDaveExplains]

So in astronomy gas means clouds of primarily hydrogen and helium while dust means clouds that contain appreciable amounts of other elements. So when supernovae occur they eject lots of dust, because all the other elements are in there.

[@Ihab.A]

@@ProfessorDaveExplains Thanks Prof. It is more clear now. By the way, I'm obsessed with your channel, I spend a lot of time watching your videos. It would be great if you team with documentary producers, like MagellanTV, to put all these invaluable episodes in a documentary like those found on MagellanTV or equivalent documentary channels or subscription based streaming providers. I'd love to buy the content. Greetings from Rome :) davvero grazie

[@ProfessorDaveExplains]

I've never heard of it but I'm open to any platform that pays me!

[@daisy1686]

@@ProfessorDaveExplains Great question, great answer.

[@lilfire4332]

Wait if there are billions of different galaxies we have a lot of planets in just our Milky Way galaxy and we have earth with life so there would be Extraterrestrials in the galaxy

[@ProfessorDaveExplains]

there could be

[@hersonlamolli6276]

I have a theory that there is a place in our Galaxy that is extreme dangerous, that our sun and it's following planet has counted disasters. An an example the asteroid that killed the dinosaurs, before probably. Just maybe we are not the first knowed human intelligent. Let your mind imagine it, sometimes it might give sense. It has been in my head since grammer school.🤵

[@davidlarondelle2326]

It's amazing how little we know about the galaxies and universe. I appreciate the tutorial which seems to present our current knowledge. It was filled with some fact,pbbg guesses and probabilities because that's all we know. If you add to that what the Bible teaches about all this you can get an even better understanding. For example, read Job chapter 38, 39, 40 and 41 and let me know what you think. The book of job is considered the oldest book in the Bible, pre-dating Genesis which was written about 1500 B.C.

[@ProfessorDaveExplains]

There are no "guesses" in this tutorial. This is observational science. The bible does not say anything whatsoever about the universe, it is religious text, not scientific. Also, they are not the oldest books by a longshot, not that it would give them any credibility anyway.

[@ElenaAshe]

@@ProfessorDaveExplains The very beginning of Bible points directly to the Big Bang. Otherwise, what is your explanation for the Big Bang?

[@comforth3898]

@@ElenaAshe There is no current explanation/evidence for what caused the big bang. Any credible astronomer/ physicist would tell you they don't know. We can only explain the universe to roughly as far back as ~13 billion years. But you are welcome to make assumptions and claims that are not backed by any evidence.

[@thunderspark1536]

@@ElenaAshe A quantum fluctuation is the theory he posts in the first video in this series. We can observe such fluctuations now. We cannot observe any evidence of a god.

[@b.griffin317]

I thought most galaxies oscillate between irregular, spiral and globular forms as they collide and interact with other galaxies.

[@michealtaylor7745]

It's not globular, but Elliptical. They're the largest & oldest of gallaxies. Lenticular & irregular, spiral & 'barred spirals make up the rest.

[@b.griffin317]

@@michealtaylor7745 Thanks.

[@waterfall9386]

If we imagine bombs exploding in space, wouldn't they look like spiral galaxies?

[@hifzushaikhshaikh7511]

Latest speed is 227km per second not 220

[@mrbanana69]

Grim dark fate? It's power armour time

[@yellowcarpet265]

flat earthers: the earth is a disk logical people: the galaxy is a disk me: an atom is a universe and we are made up of many universes, in each different atom there is a different universe. we are living in a universe inside a star, which in turn, is living in a pile of shit on some aliens toilet. we are made up of billions of universes, thank you for coming to my ted talk.

[@dennisaustin3709]

people cannot grasp the idea earth is a ball and gravity stops them and objects from flying off and we are so small compared to earth no matter where you are everything seems flat, I got a friend in Australia and he did not fall off and go flying into space.

[@yellowcarpet265]

@@dennisaustin3709 i am in australia

[@jeroen9872]

the erf may not be flat, the milky way is.

[@rrkraj]

professor dave where are you from? i am from chennai,tamil nadu ,india

[@ProfessorDaveExplains]

i live in california!

[@rrkraj]

thank you for response. i thought you would not give the answer

[@JustinWadeShorts]

I want to suspend belief for a moment and ask. If color systems like ours are atoms, what could that make up? An oxygen atom has a nucleus and 8 electrons; like our color system. And a group of atoms make up things. I know it’s a taboo topic that people scoff at, but, everyone’s had that thought. We don’t even have a definitive definition what an atom looks like. This whole place is weird. We’re on a ball with. Metal core, spinning around a ball of fire in a vast void. Like the power of 10 video from the 80s or 70s. If we go small enough. Everything has a void.

[@rheiagreenland4714]

You're using an outdated planetary model of atoms. We do have a very good idea of what atoms look like, electrons exist as a wave function around the nucleus. There is also a whole bunch more stuff besides the 8 planets. Also, planets have a negligible effect on the movement and interactions of different stellar systems unlike electrons

[@leonausten1800]

How many Stars do you want? Yes

[@nicerice8293]

youre a cool teacher to

[@dinglemckringleberry9429]

This is the BEST material to relax and take a healthy shit to... excellent!

[@jameswilko2]

Milkdromeda…. Better love story than twilight

[@michealtaylor7745]

And that means the death of what is 'two beautifull gallaxies. What a sad end.

[@ikhlaqhussain1140]

Thanx

[@Dss-bm3rz]

This provided no actual answers, but was still interesting

[@ProfessorDaveExplains]

Um, answers to what?

[@meharbankhan9203]

Galaxy movement clock or anticlock

[@baskarangovindarajulu4107]

What is the building block of living lifes

[@ProfessorDaveExplains]

Check my biochemistry playlist.

[@baskarangovindarajulu4107]

Great

[@omegasteve8485]

Or....... the supermassiveblackhole’s gravitational pull is jsut 100k light years across i mean why is their a supermassive black hole in the middle? Why the middle maybe bc its like a sun and everyhting is orbiting it

[@gumtoonistbeats7842]

uh yeah obviously

[@omegasteve8485]

@@gumtoonistbeats7842 tbf i didnt know of this when i first commented this

[@alphameme3070]

milky way was full of milk

[@astrofacsmos6427]

how did saggitarius-a form?

[@Onizuka8909]

never thought i play mass effect andromeda and wonder the galaxy is really exist

[@vksasdgaming9472]

Actually it is good game. Transits from space opera to space western nicely.

[@Manashblogs]

What is nebula

[@ProfessorDaveExplains]

a cloud of interstellar gas and dust!

[@IkanGelamaKuning]

Watching this using samsung Galaxy phone.

[@StPaul-rp4iu]

Ah, so when does the black hole enter the picture? Does it just walk on in after the galaxy is formed?

[@ProfessorDaveExplains]

You may want to backtrack a little in this astronomy series. Supermassive black holes are integral to galaxy formation.

[@44Jess453]

The star forms, then it explodes, then forms a black hole simple

[@vishwanath006]

I am alien Frome 4 galeye

[@dogwalker666]

Oh do you know Splurge he is from there ?

[@user-bu5un4qc4u]

This is good, but you must change your intro.

[@turwaith]

why?

[@jessyllejayson4967]

i understand im a kid im fan of galaxys

[@lazybazy7420]

3:32 Why are they so obsessed with calling galaxies MILK?

[@ProfessorDaveExplains]

Um, there’s just one, ours.

[@lilroast]

StripezYT *Life is Milk*

[@danlotroth9231]

@@ProfessorDaveExplains is there anything, beyond coincidence, to the similarities of atoms n electron orbits, solar system orbiting stars n galaxies and clusters orbiting super black holes? Just didn't want to go down a spirit science, Chopra rabbit hole lolz

[@ProfessorDaveExplains]

But honestly there is no similarity, electrons do not orbit the nucleus in this manner. Check out some of my general chemistry tutorials, especially the one on quantum numbers, to see what electrons are really doing!

[@busainapp6193]

Are you a geography teacher?

[@jamesprince571]

How these r created , god dammit 😍

[@Jack-ys6sf]

lmao. Yeah

[@amehak1922]

Physics and chemistry.

[@showthat64bit32]

You mean are

[@lilroast]

*What created god then if he had a son on earth😂*

[@samiam7982]

@@lilroast What created the big bang? 😂

[@Hiatt66]

there is a supermassive black hole in the senter of the galaxy

[@boyhowdy682]

What's its name huh

[@rheiagreenland4714]

​@@boyhowdy682Sagittarius A* or SagA* for short

[@omegasteve8485]

I like my name for the galaxy milkymeda

[@dl3487]

huhuh ...Bulge

[@intelboydj1]

Video upload will be coming soon: "Silver the Hedgehog Discovers a Milky Way Galaxy"

[@galaxynightowl3289]

Intro is lol I wond mind

[@sunitapadhi5522]

Milkomeda ok

[@TsarDragon]

I nearly died when he said what they decided the new galaxy was gonna be named. Milkdromeda

[@andyflemin]

Wow

[@Radhakrishn4545]

You are intelligent but your starting is so funny

[@MrShalintha]

Love u

[@melz71]

220km/h is more than the speed of light. Its imposiblle.

[@ProfessorDaveExplains]

Um, it is absolutely nowhere near the speed of light.

[@melz71]

@@ProfessorDaveExplains Sorry I mean 220km/s

[@ProfessorDaveExplains]

Still not even close.

[@haven216]

@@melz71 The speed of light is nearly 300,000km/s. It is nowhere near

[@dogwalker666]

Err my car can go faster than 220KPH that's only about 130 MPH.

[@assainationclassroom5237]

Is their another earth in the milky way

[@morestuff64058]

there are so many earth like planets in the milky way that we can live in right now

[@morestuff64058]

yes there is, there is a planet named kepler 186f, its in our galaxy and its just like earth

[@RandomCate]

We're in the milky Way Galaxy there are also might be some stars in the milky Way Galaxy and planets and Pluto is a dwarf planet

[@vintagelove27]

i need to live 4 bill years may be in fortnite to live event

[@spacegod701]

what is teh milky way galaxy

[@elitecereal]

it's the galaxy that we live in.

[@rheiagreenland4714]

The milky path of milk

[@dahiruahmadali8816]

La ilaha illallah Muhammadur RasululLah.