The Milky Way Is Missing Satellite Galaxies
There’s a big difference between the number of satellites that simulations predict, and the number we’ve actually seen with telescopes, but why?
Hosted by: Reid Reimers
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Sources:
arxiv.org/abs/astro-ph/9901240
arxiv.org/abs/astro-ph/9907411
arxiv.org/abs/astro-ph/9810070
kipac.stanford.edu/highlights...
astrobites.org/2017/11/22/no-...
www.researchgate.net/publicat...
arxiv.org/abs/1009.4505
arxiv.org/abs/1602.05957
Images:
svs.gsfc.nasa.gov/11293
www.eso.org/public/images/pot...
fire.northwestern.edu/visuali...
www.sdss.org/sdss-telescope/
commons.wikimedia.org/wiki/Fi...
en.wikipedia.org/wiki/File:Cl...
www.tapir.caltech.edu/~phopkin...
svs.gsfc.nasa.gov/10135
svs.gsfc.nasa.gov/11894
svs.gsfc.nasa.gov/11388
Пікірлер: 342
If it's not in the Jedi Archives, it does not exist.
@maxwipson147
5 жыл бұрын
Unless someone erased it from the archive memory.
@Gabriel_Cook
5 жыл бұрын
Points! To both of you.
@dylangraham4266
5 жыл бұрын
100 Points team Gryffindor
@ThePoohat
5 жыл бұрын
@@dylangraham4266 and my axe... wrong franchise bruh
Those galaxies are part of the DLC.
@TheRogueWolf
5 жыл бұрын
Available for just 4000 Starbux!
@sapphirestar22
5 жыл бұрын
This is a great comment
@harishuskic7270
5 жыл бұрын
Hurry now there is an expansioni pack to get all the galaxu updates for price of one with an extra ability to unlock lightspeed travels x2
@robo3007
5 жыл бұрын
I'm sure we'll all feel a sense of pride and accomplishment once it's unlocked.
Thanks for the update bro
4:28 Anyone else started freaking out when it got closer and closer?
Imagine how crazy it would be living in the dwarf satellite galaxies, looking up at the Milky Way filling their night sky half the time.
I don't know why but it is amazing to think there are entire galaxies in orbit around our own
it often helps me to check my couch when i lost somethign you already looked in the couch ?
@scarletletter4900
5 жыл бұрын
Holly the space between cosmic couch cushions is a black hole❕
@doctor_owl
5 жыл бұрын
Well I found 75 cents, the tv remote, a wormhole to a parallel universe, & 2 paper clips, but no galaxy... Mom's gonna be pissed when she finds out we lost it!
@phosphatepod
5 жыл бұрын
I think the galaxy I found in my couch might be yours... I accidentally threw it out.
@wefauxdup5738
5 жыл бұрын
I seem to always be sitting on what im looking for maybe we should all stand up and look?
@zarinaromanets7290
5 жыл бұрын
Ye, have they tried turning it off and on again?
Fascinating!
What makes me crazy: "It's missing? Well where is it?" (Tightens hands into fists) "If I knew where it was .... "
„Small“ Galaxies, cute
Awesome video
Hi, can you guys use one episode to explain galaxic sheets, walls and filaments?
I think that we attribute too much on simulations being exact when you can't predict everything at a scale of the universe in such an exact way. Yes, we can predict the motion of a planet around a sun or a galaxy around another etc but it only takes small variances in even the slightest movement or gravitational effects to make a big difference in reality.
Could it be just "bad luck"? I mean the models are correct but it just happened that we don't have enough satellites in our small corner.
@BartJBols
2 жыл бұрын
yes. Its just exceedingly unlikely
Cool video 👍 👍
I aways wait for your videos😍
The Large Synoptic Survey Telescope is renamed the Vera C. Rubin Observatory, it is delayed to 2023 due to Covid. Additionally, we will have the James Webb Space Telescope (JWST), which will launch by the end of Oct 2021 and be active in about 6-8 months.
Do other galaxies similar to ours have large numbers of satellite galaxies?
This channel is a poor mans PBS SPACETIME.
The Magellanic Clouds aren't dwarf galaxies. LMC has roughly 35 billion stars and SMC has a few billion, too. That ranks them as #4 and 5 respectively in the Local Group. Note: This may have changed with the recent discovery of the Antlia II galaxy.
Wtf how have I never heard about these "satellite galaxy's" untill now? Kind of a big deal for nobody to ever talk about. everyone always says andromeda is the closest galaxy but never any mention of these 100 plus satellite galaxy's 😐
@petergray2712
5 жыл бұрын
Geographical bias. Part of the problem is that amateur astronomers mostly concentrate on objects that they can easily see, which is mostly those seen in the northern hemisphere. And the astronomy blogs and magazines reflect that bias. The LMC and SMC- the two largest dwarfs- can only be seen on the southern hemisphere, and they don't get much publicity in USA and European publications.
@neeneko
5 жыл бұрын
Usually only the Magellanic Clouds get talked about, or at least those are the only references to satellite galaxies I can recall running into.
Dwarf galaxies: 10 BILLION STARS. Astronomers have some impressive ego to make up terms like that.
The dust etc in the spiral arms of the MW block out a shitload.
Do you ever get the feeling that our galaxy is... different.
Diffuse interstellar bands. Formerly known as Emo bands they have settled down and specialize in post modern rock.
_Weird_ - a few weeks ago, I learned of this problem in a paper about dark matter. In that particular work, the authors suggest that the solution might be in tidal-dwarf galaxies (TDGs)
The paper from a few months ago about dark matter and dark energy being the same negative mass particles might help explain this
I love how humans look out there at real time evidence in the galaxy and say, “No, that can’t be right because our simulations are what really SHOULD be correct” 😂
😐 I had the theory about dark matter being scale based for ages. Glad to see others are thinking it too. Also wondering about gravity. Hope we can solve both these in my life time (by we, I mean scientists heh) but I doubt it.
JUST LIKE THE SIMULATIONS!!!
My Mom's helpful answer to this (and any question about lost items): "Did you look where you usually put them? Well... try to remember where you and them last."
@phinxlion
5 жыл бұрын
Funny that its always in the last place you look though? *(rubs chin in a confused manner)*
I'm noticing a pattern here. Missing mass everywhere.
Ditching dark matter isn't hard to swallow, it's refused completely. Lol
The missing galaxies are concealed by Dyson spheres and or swarms.
@davidhand9721
4 жыл бұрын
We would be able to see them in IR.
sucked into black holes these galaxies did
Wasn't there recently a discovery of a "large" dwarf galaxy hidden from view by our own galaxy that was only found by Gaia mission noticing the stars distance and trajectories didn't match the Milky Way? Also I wonder if the answer to this has something to do with voids as there is evidence that we may be on the edge of one
Perhaps they evaporated. Or plunged into the Milky Way? Been a while.
Do not worry, our milky way is too big to be swallowed by that space worm - i think.
I know 1 already collided with milky way 1\12 or 7 1B YA but there might be more
Reapers! Its Reapers! they are coming for biotics!
I'm just glad I didn't grow up in a dwarf galaxy. I'm a big galaxy kind of guy.
The new paper about dark matter and dark energy being negative mass could help in explaining this.
These dudes really talk with there hands!!
Or it could mean those other dwarf galaxies have merged with others during collisions.
Well, I hope the models are based on thorough observations.
What if dark matter is a strange remaining energy from anti matter being consumed, or regular matter being consumed if you're made of anti matter.
Milky way might have eaten many of it's dwarf galaxies-galaxies have been known to do that...
Someone find Commander Sheppard
Where can I learn more about the idea of dark matter operating differently at different scales?
@hatfieldrick
5 жыл бұрын
the same place you might learn all about phlogiston and ether and those crystal spheres the planets are stuck to. it's just a stupid hypothesis without one scrap of direct evidence. they're grasping at straws when they talk about dark matter. nobody really knows anything definite about it, and the odds are that it doesn't even exist. eventually they're going to have to start taking some of the alternative explanations seriously, because there's more and more data contradicting the whole idea of dark matter.
Blasted by our old quasar!
What are "square degrees?" Are they related to steradians?
Dude, where's my satellite galaxies?
All i know is that the Kree are from a Satellite Galaxy of Milkyway called The Large Megallanic Cloud...
The milky way should file a missing person's report.
@stormblade2510
5 жыл бұрын
Adam Roach the Science Coach more than 10 of them.
@adamroach4538
5 жыл бұрын
@@stormblade2510 Yeah, lol.
Or maybe the missing galaxies are on the other side of the Milky Way relative to us. Therefore we can't see them.
It’s probably hidden behind the center of our galaxy
Is there a difference between dwarf galaxies and star clusters?
Maybe it's our hygiene, or we are not your average planet in your average galaxy.
aliens stole 'em
How does our galaxy and its dwarf satellites compare to others in the local group?
Damn...Someone needs to put Galactus on a diet.
The concept that criterion for call something is dwarf is that it has fewer than a billion stars is mind boggling to me.
I have problems with dark (matter and energy). It just seems contrived.
Impossible, perhaps the simulation are incomplete.
OK...just admit it...we don’t know diddly squat about dark matter or energy. Not just squat, mind you, but DIDDLY squat! We’re like the chimps at the beginning of Space Odyssey 2000. We know a few things but really very little. Except for pride. We know that really well.
@filonin2
5 жыл бұрын
Science knows more than any alternative, of which there are none.
maybe the universe is older than we think?
ALIENS I KNEW IT
Guess it might help when we work out what dark matter actually is
Looks like the simulation models were wrong!!!! easy peasy
@altrocks
5 жыл бұрын
One thing that fashion and science have in common is that questioning the models is frowned upon.
@SahasaV
5 жыл бұрын
well, that seems pretty obvious. the real question is why they are wrong.
@shrapnel4213
5 жыл бұрын
@@SahasaV cause ma dik too big. dem galaxies are here
@SahasaV
5 жыл бұрын
@@shrapnel4213 hehe
The universe & its existence is not determined by the inhabitants. I want to know how big an entity would need to be in order to watch a galaxy spin.
Have you tried putting their picture on milk cartons?
Let’s see how long it takes creationists to jump on this “We don’t know why, therefore GAWD!!!” topic
Therefore, we don’t live in a simulation.
Maybe it’s eating them.
If your model and the observation disagree, then your model is wrong.
Have you accounted for Eldritch Galaxy Eaters?
It’s not like the simulations Only true mad lads get that reference
Of course something is wrong with the models hahah
Jiren blew 'em up
I thought there were only 7 - 12 drawf Galaxies
Their models are not just inaccurate, but fundamentally wrong. The amount of dark matter in a galaxy can only be determined from *gravitational lensing*. So when light from a very distant galaxy bends (like a lense) around a nearby galaxy, then the amount of bending can tell us the mass (gravity) of the nearby galaxy. So there is just more mass than estimates used to predict that were based statistically on the amount of light in a galaxy. That is all dark matter is. Nothing special. The only way we can figure the amount of dark matter in our galaxy is thus thru statistical guesswork based on a minority of examples which are rare. But even despite that, if the majority of factors are unknown then all you have is guesses based on other guesses. This could be improved upon radically if you understood the solution to the problem of rotation curves of galaxies (Rubin's problem). The following modelling is derived from far better computer simulations that reconcile Rubin's problem with Newtonian gravity by simply realizing that spiral galaxies comprise a super-massive PAIR near their center. It should be obvious that if there is ZERO velocity at the exact center then it must be a binary system. All data shows zero velocity at the center. Only these models say why. At the same time showing why outer stars rotate quicker than in a system with a single body at the center. Try this: www.flight-light-and-spin.com/summary%20of%20rotation%20curves%20of%20galaxies.htm
We're in a simulation
What if you just can’t see that far, and we need better telescope
1998 computer simulations? Lol
Maybe they're hiding
I have a question: Can dark matter form stars?
@massimookissed1023
5 жыл бұрын
It doesn't seem to interact much with other dark matter, so it doesn't coalesce into lumps.
Whaaaaaa?
in other words, (in science), just because you think you know some answers, it doesn't mean you actually know the answer. It just means you may know a part of the answer. Until more facts or data prove you wrong... or more right than wrong.
So what exactly leads scientists to believe there should be more satellites out there?
@TheWolfboy180
5 жыл бұрын
Pärismaalane A multitude of simulations predict more satellites, and the best simulations are right about most everything else in our galactic neighborhood.
@2ebarman
5 жыл бұрын
@@TheWolfboy180 So there are other objects in our galactic neighborhood, besides satellite galaxies? Or do you mean larger galaxies, such as M33 and M31? btw, a new finding was announced lately about a satellite galaxy with a mass of nearly third of milky ways, so a big one, but with abnormally low luminosity. It's called Antila 2 if memory serves me right. It's in the zone of avoidance so that in conjunction with it's low luminosity has enabled it to be undetected for so long. You might know about it, I just thought I mention it ... :)
@TheWolfboy180
5 жыл бұрын
Pärismaalane The issue is that nobody knows why the simulations are wrong about this one thing, when they’ve been calibrated and predicted the right things about other things on their own. That’s what the mystery is. Also, yes, I knew about it, but thank you for taking the time to notify me :)
HUSTLE HANK!? We know you took them!
@TheCimbrianBull
5 жыл бұрын
Dwarf galaxies are for the weak!
Learning is good. Today I learned that if you feel like you might need to poop soon then just go and poop and don't put it off, because you may be just a sneeze away from disaster.
@Mars2030YT
5 жыл бұрын
username checks out
@darkcontrast8470
5 жыл бұрын
Funny stuff
If calculation suggests there must be more stuff than we actually have - blame dark matter
Sorry I'll give them back
Have thet tried putting the galaxies pictures on a MILKy carton?
@christelheadington1136
5 жыл бұрын
Ooops that they not thet
Galactus
Mwahaha! You poor northern hemisphere people may be the right way up but you cannot see the LMC or SMC.
@ipissed
5 жыл бұрын
So what, you can't see the RDA, or the QIS.
@Ignacio.Romero
5 жыл бұрын
@@ThunderGun2 Australia
@cyanidejunkie
5 жыл бұрын
Jerry Rupprecht As long as you could go ahead and explain that to the flat-tards, I’m cool with that.
@berndbuchholz
5 жыл бұрын
i feel offended.... was this somekind of microagressiv racism ?? ...walks back to safespace, sucking his thumb...
@-KillaWatt-
5 жыл бұрын
Take your sky privileges and hoop it. I'm tired of the sky patriarchy. 😂
What’s the point of the James Webb if there’s a telescope coming out 1 yr later that will supersede it? I guess orbital telescopes do do more than ground based telescopes. I don’t get why your talking this one up. 😅
Can't be that the models are wrong, I must mean the universe is wrong.
Cool.
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