M21 - 8-million-year-old stars - Deep Sky Videos

[@omeshsingh8592]

A non-boring video on an open cluster. Well done.

[@Twitchi]

+

[@d0themath284]

i love the sadness and disappointment in brady's voice! he got so excited, but then it was all taken away.

[@ELYESSS]

"A naked top and a well populated bottom means you're old" -Brady John Haran 2016

[@xiaoxiao01]

im wondering, is that a bald dude with a lot of hair on his back or a bald dude with a big junk?... or hairy legs? :P

[@ChaosPootato]

It's genius xD

[@MusicalRaichu]

and Mike replies about reading it "at a *crude* level".

[@L0j1k]

Wew!

[@xyz.ijk.]

That was one of the most effective presentations of any of these videos. And it was hilarious.

[@terahlunah]

"Amas d'étoiles près du précédent " is French for "Heap of stars close to the previous one"

[@carschmn]

Florian Poncabare pretty much

[@prateekgupta2408]

Ok

[@TheVeryHungrySingularity]

I love these videos. All the people involved with this and related channels are fantastic.

[@johnh539]

This "find something interesting" approach just keeps teaching me fascinating detail I have never heard before. Really enjoying watching my way though the sett.😊

[@gumunduringigumundsson9344]

weeee a new one!! made my day. Seen all deep sky videos at least 2 to 20 times. Like so much every single participant of deep sky videos particularly. Thank you.

[@MattiasCL]

One of the more interesting videos in a while on deep sky videos! Keep em coming 😄

[@paulebberson4884]

Super video - lots of new science for me. The Q&A format is spot on too.

[@blshouse]

Why is his shirt on inside out? It can't have gone unnoticed when he was miked.

[@philorkill]

I just love the deep sky series! Keep it up!

[@MrPostm]

I love Brady's chain of reactions in the beginning...

[@celestialrangi3602]

nice open cluster, I'm just getting started and I been watching u for a little while now, thanks mate subbed

[@MountainFisher]

I totally remember looking at pictures of star clusters in our encyclopedia when I was a kid in 1960. Pictures from the Wickes and Lowell observatories. I even talked my granddad into taking me to the Mt Wilson observatory not too far from where we lived, I was ecstatic, but alas I didn't get to look through one of their telescopes. I didn't become an astronomer, but did become a biologist working in the aerospace field. I'm retired now, but I did get to become a scientist.

[@martinpickard6043]

Nice. A lucky young lad got to follow through on his dreams. I hope his grandad got to know how he helped shape a young boys dreams into a lifelong ambition. Hope you got the chance to pass it on.

[@marvelous1358]

These are the best videos on KZbin

[@mrechonet]

Shirt inside out

[@jayatherton8673]

I thought so!

[@Deif88]

probably because there are brand prints on the shirt and instead of spending hours in post-production to blur everything to avoid copyright issues or unintentional product placement he just turned the shirt inside out.

[@peterbucek2136]

But why?😂

[@frognik79]

Like an inside out shirt and a well populated bottom.

[@666Tomato666]

+Peter Bucek BBC rules on advertising

[@ckmishn3664]

I know this channel doesn't tend to get updated all that often or deal with astronomical news but I would be interested in getting the take of the regular contributors to your videos on the news of a potentially habitable planet being found orbiting Proxima Centauri (the star that is second-closest to the Earth).

[@fatsamcastle]

The one thing about every planet that's thought to be habitable, no ones got a clue about it.

[@assalane]

An ad about the "hollow earth" in a DeepSkyVideo... Why do those people even exist?

[@Slywolf1992]

Very good explanation

[@panthershockey4453]

"naked top with a well populated bottom" sounds like my ex girfriend

[@DavidOfWhitehills]

Q. Does the helium 3 act as a firestarter for the hydrogen fusion?Q. Do all the stars form at the same time by a process of chain reaction - the first exerts radiation pressure on the surrounding gas and dust sufficient to trigger gravitational collapse all around it and so on?

[@iagocasabiellgonzalez7807]

Hey, this was a very interesting piece of science. Thank you

[@ashcole223]

SO GOOD!! LOVE THESE VIDEOS!

[@gkelly34]

What triggered the formation of all these stars at the same time? What switched it on?

[@manco828]

The Trifid Nebula is famous for its use on Star Trek original series.

[@ZachariahNelson]

why is his shirt inside out?

[@UnicurnFurts]

Too busy being a scientist lol

[@jimidybobidybo]

So what happened 8 million years ago to set off all this star creation?

[@floodychild]

Interesting question. This maybe be the answer is found: Star Clusters. When stars are born they develop from large clouds of molecular gas. This means that theyform in groups or clusters, since molecular clouds are composed of hundreds of solar masses of material. After the remnant gas is heated and blow away, the stars collect together by gravity.

[@briandeschene8424]

Caleb Engineering, LLC Any proposed explanation would start off as and remain a "story" if it cannot be or is not tested against observed data. In scientific terminology, it would be described as a postulation. However, if the "story" repeatedly agrees with more observed data vetted by peers, it becomes accepted as a theory. This status will remain until new observations/data create a need for adjustment or replacement with a different "story" (theory). Eventually an accepted theory is considered factual after standing the test of time. This is known as the scientific method. And thus the human race takes another step forward. Repeat.

[@mrspidey80]

Maybe the shockwave of a near supernova hit the primordial Hydrogen/Helium-Cloud and caused it to collapse into stars. That's usually how it happens. One way to tell is to look at the metallicity of the stars. If there are traces of heavy elements (anything above Lithium), it's a sign that a supernova was involved.

[@ronaldderooij1774]

Gravity.

[@nikolaos9175]

Thanks

[@NeonsStyleHD]

What happens when a star moves from the hung up stage on the right to the main sequence? If you were in that system, would there by some visible reaction of the star as it's colour and brightness increase? Would it be sudden? Gradual? Flash?

[@HillbillyHades]

By human timescales everything in the cosmos is gradual.

[@NeonsStyleHD]

***** You think that up all by yourself? How long did you sit on it? lol Sheesh.,

[@HillbillyHades]

Is the word cosmos too intelligent for a KZbin comment? Should I have used like space or something?

[@NeonsStyleHD]

***** Your original comment was stupifyingly obvious. Everything is gradual everywhere.

[@fobusas]

I wonder what's the distance between stars in that cluster? btw, wikipedia says it's age is more like 4.6M, i wonder which one is right.

[@pseudorandomly]

And just to illustrate how understanding can change, the OPENCLUST database lists the age of NGC 6531 as about 11.7 million years. This database was last updated January 2013.

[@bazpearce9993]

So basically a cluster pulls it's pants up and thinks "This shirt doesn't go with these." Goes back to wardrobe for a better looking shirt.

[@Jerome...]

8:00 White 8:10 Red.

[@Kavetrol]

Do big stars fuse hydrogen very quickly, or do they die quickly because they can only fuse small fraction of it before they blow up ?

[@pipertripp]

Kavetrol it's both. To remain in hydrostatic equilibrium, high mass stars must fuse hydrogen quickly. They are also less opaque than low mass stars, so they radiate more efficiently... which means that they must fuse more quickly to stay in hydrostatic equilibrium. They're also not fully convective like low mass stars, so like you said, they have proportionally less fuel to work with as well.

[@TimmacTR]

This is becoming Messier..

[@carschmn]

TimmacTR the stated original purpose of the channel was to go through all 110 Messier objects.

[@martinpickard6043]

...ouch! That pun hurt 🤨

[@brochan11]

Look up the Hertzsprung-Russell diagram.

[@VDeshm]

where is the m8?

[@UAPJedi]

So, will these stars have young planets around them?

[@martinpickard6043]

Possibly. It is believed after star formation, proto-planetary disc of remnant matter forms in rotational plane and coalesces into planets.

[@willwatson1929]

yeeeeeeeeeeeeeeeeeeeeeeeessssssssssssss brady!

[@sl9guitar]

Anyone else notice his polo is on inside out? :)

[@bouwmr]

And as I recall, not the first time that has happenened :-)

[@symetryrtemys2101]

That way, you don't have the seams of the shirt against the skin. Utterly logical!

[@Starclimber]

Exactly why I do the same thing with particularly seamy garments!

[@ZachariahNelson]

But the buttons are inside out! It's so inconvenient!

[@symetryrtemys2101]

Buttons, schmuttons!

[@Stadtpark90]

25 years ago, when I was in school, I had a schoolmate wearing things inside out as a form of protest / showing how non-conformist he was...

[@DrogoBaggins987]

So if this is how pretty much every star is formed then all stars like our sun and smaller are pretty close to some high mass stars that go super nova when they are very young. I wonder if that could have something to do with life starting chemistry. Thought from any of you super smart egg heads?

[@oldi184]

Stars are electric driven not gravity driven. Its not nuclear oven. Sun surface temp is 5000 C, Chromosphere is 10000 C and Corona more than 1000000 C. If the nuclear oven model was correct the closer to the oven the hotter it gets but its completely opposite.

[@Edenssunlight]

you must be a fan of the electric universe model. I have to agree that many of their theories are intriguing and deserve further study there is no doubt about that. following your comment I find fault in what you say. It may be in the wording etc. but it does get hotter as you get closer it's all a matter of perspective I would guess as you approach the sun the temp does increase and as you pass it's outer atmosphere it will decrease according to its relative distance from the surface itself.

[@dippingbird7533]

The main source of energy put out by the sun is by the process of nuclear fusion, and it is thought that the Corona and Chromossphere are so hot because of induced currents by the changing magnetic field of the sun, however they are very faint and thin compared to the Photonsphere. And below the Photonsphere the nuclear oven model generally holds true.

[@samvimes5124]

Make sure to let everyone know when your first research paper passes peer review.

[@DevAngelo]

lmao... good one m8

[@oldi184]

Robert B Yes. Electric sun model is more simple and elegant than old and complicated nuclear oven model.

[@TheAutoban1]

So I guess he's estimating from the chart to say it's 8 million years old, m21 is 4.6 million years old, I guess this is one of those "within an order of magnitude" type questions

[@pseudorandomly]

To be fair, the paper he's reading from is from 1993-4, and observational precision improves as time goes on. One thing in particular is that distance estimates get better, and that has an effect on the perceived properties of stars, hence an effect on age estimates. It may well also be due in part to an improved theoretical understanding of stellar interiors.

[@ThermalSpace]

his shirts inside out..

[@Zw1d]

moree

[@MrN1c3Guy100]

Baby Stars.... soooo cute O_O

[@StanleyKingChan]

pretty young star

[@vasudevans1224]

Naked top well populated bottom LMAO

[@seethegalaxy]

Man you all love to dis open clusters.

[@wilfredswinkels]

Boys will be boys :-) :-) 8:03

[@michaelexman5474]

systemic not sistomatic

[@auto_ego]

You can always trust an aussie to get to the root of the matter.

[@ssj3gohan456]

Just saying; the view counter was at 43 when I started the video.

[@guitarplayer1071]

do you want a prize?

[@ssj3gohan456]

Can I have a prize? Maybe pizza?

[@Twitchi]

It's pretty easy to win a cookie.. maybe you should ask for that

[@fulkthered]

"*"

[@D351R48L3]

this is wrong the world was only invented 6 thousand years ago

[@Octanis0]

#bait

[@dragonman5869]

Yeah 3rd like

[@dragonman5869]

OH and first comment