M2 - Recycled Stars - Deep Sky Videos

It seems stars in globular clusters may have a more colourful history than previously thought. Messier object playlist: bit.ly/MessierO...
M2 is also known as NGC 7089
Featuring Professor Mike Merrifield from the University of Nottingham.
(Yes I forgot the S in Herschel - it's not like he is a big deal in astronomy or anything!?)
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Video by Brady Haran

[@DeepSkyVideos]

Follow our progress with this video playlist: bit.ly/MessierObjects

[@jjbudinski8486]

Professor Merrifield is awesome, here is why: Always has visual aids on hand, so important for getting abstract points across. No BS- Professor Merrifield is always honest and is not afraid to discuss the weaknesses of a theory or his own understanding. Is passionate in an intellectual, difficult subject matter. People like this are always interesting, and their enthusiasm is contagious. Dude is just cool AF let's be honest, sweater game is spot-on

[@MrBardache]

I came across this channel by chance a while back and have not seen new videos until now. Very happy I stuck around and waited, thanks.

[@Natedawg422]

Damn! Wish I could speak as fast and clearly as this guy! The true aspects of a brilliant mind!!! Love Merrifield!!!

[@DeepSkyVideos]

Yes I forgot the S in Herschel - it's not like he is a big deal in astronomy or anything!

[@Mrfailstandstil]

Prof. Mike is so passioned about astronomy! i love when he talks about it=)

[@lgnlint]

Man, I wish I was smart. A career in research seems so amazing.

[@stonedogre]

i must admit that i was super nerdy excited to see another addition to the Messier object playlist. And Professor Mike Merrifield is awesome. thank you both so very much.

[@gregf9160]

Gor bless Prof. Mike Merrifield. Really enjoying this wee series. Thanks.

[@RichardAveryiii]

About time we got another! No joke I watch these every single day; I love them. Please keep making them Brady your a genius...

[@Topher2k4]

I've been waiting for a Deep Sky Video for awhile!! Awesome to see you back!

[@LamdaComplex]

IT HAS RETURNED! My favorite of Brady's channels.

[@SeraphimKnight]

I've watched every video in Deep Sky Videos, and I'm really hoping that you come back to it and do some more!

[@Duncan_Idaho_Potato]

Oh, and YAY for the return of Deep Sky Videos! We missed you!

[@kesakhan]

Thanks for getting more of these done Brady!! You're a champ!

[@DeepSkyVideos]

Glad you like it!

[@NnO0Worries]

What keeps a globular cluster from collapsing? Unless it rotates like a galaxy, what keeps the stars from pulling together?

[@xpclown]

This guy is a living legend the way he can incaptivate and enthrall while articulating information at an alarming rate, its almost like being plugged into the matrix except his knowledge is the database and his enthusiasm the bandwidth!!

[@Pow3llMorgan]

Pants! You really have a knack for asking the REAL good questions, and after all, isn't that the best basis of learning :)

[@ronyasami2368]

Deep sky objects are my favourite study in Astronomy

[@KennethBrandon]

Since you've been gone I've now seen all messier objects with my telescope! Also my astrophotography has improved by huge bounds!

[@AutoPsychotic]

Heck yes, I've missed this series!

[@bain5872]

Gut, Heir Brady. Very fine return!

[@windywild6779]

I am Mohamed from Tunisia.Thanks for the great effort that you are doing to produce such great videos about Messiers ...still waiting the full collection of 110 videos :)

[@tomatoso27]

great video! i'm always happy when I see a deep sky video on my feed.

[@psycotria]

Great video! Thanks for making something for the self-educated, sci-literate layman.

[@Inkrementalgeber]

You realy can't imagine how happy I was about seeing this video!

[@InfamousBLT]

WHAAAAAAT New Deep Sky Video? Does this mean there are more to come? Don't break my heart by saying no

[@--Za]

"When you've seen one you've pretty much seen them all"... he says ... like a northern hemisphere resident generally does ;)

[@insomniac1893]

A new video! YAY! :D I love this channel so much. Well I love all of Brady's channels actually.

[@Duncan_Idaho_Potato]

It may be that globular clusters all look pretty much the same but that just means that they're all equally ASTONISHINGLY beautiful. They always make me think of David Bowman in the movie 2001: "My god... it's full of stars!"

[@Arpedk]

Welcome back :), the long waited video !

[@666Tomato666]

and to think that they are talking about the age, composition and origin of stuff that is visible for us as nothing but a collection of dots gotta love living in this age

[@ABitOfTheUniverse]

Yay DeepSky is back!

[@Kairikiato]

numberphile, periodic table of videos, sixty symbols, deep sky videos, brady knows how to work a scientist

[@ABitOfTheUniverse]

Good choice, M2 is in Aquarius and will be visible in the night sky this summer. It's right on the back/shoulder of Aquarius and forms a triangle with Alpha Aquarii, otherwise known as Sadalmelhc, which marks Aquarius' neck and Beta Aquarii, or Sadalsuud, which marks Aquarius' waist. Most of the stars that make up Aquarius are rather dim and it's one of the least visible of the zodiac constellations, but if you can find the Great Square of Pegasus look just below it and you might spot M2.

[@cristianfcao]

0:45 Well done Brady!!!

[@crowjr2]

Great video! Welcome back...here's hoping tree are more soon.

[@lamebubblesflysohigh]

nice office :) many windows with trees behind them, Im jelly

[@Platyfurmany]

***** I was thinking the same thing! :-)

[@NoNameAtAll2]

Hello jelly

[@maxinator6809]

Thanks for the new video, love them all!

[@ashwith]

Hope the professors with KZbin accounts will see this and disagree. You ask really good questions during the videos.

[@un2mensch]

Very glad to see another Deep Sky video after all this time! Still hoping for an explanation of adaptive optics from one of the astronomers (I know it's been touched on before). It's the lasers, you see.

[@jamesneace5559]

I'll pick one at random, in numerical order.

[@Flyineddy]

Very nice and informative video. I can listen to professor Merrifield all day. :) Also nice to see some of his glass models (I can see Saturn) in the background. I've actually just ordered a Milky Way one. I'm looking forward to when it arrives. :D

[@Millyshirley]

I can't wait for my Astronomy course!

[@MrBakmeel]

Yesss. It's back. TY Brady :D

[@dragos7puri]

Hey Brady, do you think you can make a series (or new channel) for amateur astronomers? Something based more on the practical side of things, like using your scope, finding objects, astrophotography (amateur level) etc.

[@CorboMM]

Great video! taught me quite a bit really and I almost have a heart attack when I came this sunday to youtube and realised there was a new deepskyvideos video, cheers!

[@lilmicro01]

Yessss i missed these videos!

[@TheSandisfaction]

love these videos thanks alot brady

[@sgurd08]

at 4:20 he's like 'fuck you camera man'

[@DeepSkyVideos]

I don't think any of The Profs would want to teach me ! :)

[@gulllars]

I would be interested to hear a little bit about what it would be like to be IN a globular cluster. If you were on a planet orbiting a star on the outskirts, halfway in, and near the center. Would it be possible to sustain life there? How far are the stars apart? What would the sky look like? I think these are interesting follow-up questions about globular clusters.

[@MrWinotu]

Sun must have also been in globular cluster once it was born... There's theory that it was knocked out by another passing star that travelled along the Milky Way disc...

[@scottanderson8167]

There is another video about that. It’s one of the Messier open clusters. Idk what number.

[@Xrun3scapeX]

Yes a deepskyvideo!

[@celtgunn9775]

Kind of a bummer that they consider one cluster much like any other. To me, each are beautiful in their own right.

[@AVMamfortas]

The archetypal 'lovely old Professor'.

[@kashmirha]

Not old yet :) But super sympathetic.

[@DaRealFiberOptix]

that picture at :55 threw me into astonishment

[@igshaman]

What a pleasant surprise!

[@stonestreaker]

I wish The Sky at Night was a technical as this nowadays.

[@Mongalz]

Finally a new video! Thank! Very interesting!

[@rapturecase]

I like the composite thumbnail. :-)

[@pukulu]

Strontium and Barium are only made in supernovae so the 2nd and 3rd generations of stars in M2 include material collected from the explosions of previous supernovae. There must be some neutron stars and black holes in M2 left over from those explosions.

[@ragnkja]

We can also know that both generations of stars in the cluster have remnants of supernovi in them, since neither strontium nor barium can be made through simple fusion.

[@Mythricia1988]

You can see the milky way just fine. As for the universe, discussing the shape or characteristics of it goes very deep into theoretical physics - but generally the consensus is that the universe probably doesn't have a spacial edge (thus, no real shape), but probably a temporal one (as in, time). I suggest you search for the video "How Big is the Universe?" - by Minutephysics, it should help you out.

[@Falcrist]

Yay! New DeepSkyVideo! :D

[@jefflucas_life]

How does globular clusters form like this?

[@scottanderson8167]

Jeff Lucas Astrophotographer you cluster together globuloids and presto! Globular cluster.

[@Yakushii]

Well, you have an interest in the subjects. Clearly you underestimate how much professors love engagement from the students!

[@JJ4eva2]

Pedantic moment: Your annotation for Periodic videos at around 0:50 has a typo in it and is "Periodc Videos". Just thought I'd let you know

[@msmith9863]

generic property of clusters: do you mean it's like looking at a huge field of flowers & you see clusters of red flowers... is it like red tulips here, red roses there or is it every cluster of red flowers is a cluster of roses? "it looks like every other globular cluster...when you've seen one you've seen them all" that seems weirdly significant to me...I mean when you are looking at a vast area isn't similarity a possible pattern? (or maybe they aren't as similar as they seem when looking at them)

[@Dyslexic-Artist-Theory-on-Time]

Very interesting video!

[@Thunder_Dome45]

Before I saw this I thought the stars were as old as the milky way and the globular clusters, but its the whole cluster that's old, not the stars making them up. I thought the stars were some kind of different process than stars in galaxies some how.

[@DeepSkyVideos]

thanks

[@KuroAkatsuki]

More videos now !

[@HairyFish45]

YES MY FAVORITE GLOBULAR CLUSTER!

[@KuiperObservations]

I presume the 'blurring' is because the uncertaintu is been taken into account perhaps?

[@ABitOfTheUniverse]

Mike brought up ages, and I looked through the paper at arxiv and I didn't notice anything regarding the ages of the stars. I wanted to see what the difference was between the younger and older ones. I know M2 is 13 billion years (Gy) old, but surely some of these stars are from different generations. I wonder what the lifetimes of the stars in the cluster have been for the last 13 Gy. If they were, say, 5-10 Gy then there would be 2nd and 3rd generation stars in the cluster today.

[@MrWinotu]

How close are these stars in globular clusters? I wnonder if you live on a planet around one of the "suns" you can see the other ones a little big bigger as stars than we see stars on our sky...

[@BrianSheppard]

Almost said "internet" at 0:30 ;)

[@klausolekristiansen2960]

We have Hertzsprung on the x-axis and Russell on the y-axis.

[@BlenderGameArtist]

amazing videos!

[@boncuk370]

I love this guy awesome teaching thx...

[@Mythricia1988]

Different generations of stars are made up of different stuff. It's fairly easy to tell our sun is not a first generation star, because it doesn't contain the elements that a first generation star typically would. So, yes - but it's not easy to elaborate in just a KZbin comment.

[@scottanderson8167]

Is there any other circumstance where you can say “globular?”

[@ChrisTheGregory]

So is blurring a Hertzsprung-Russell diagram standard procedure, or did some guy just glance at the diagrams the one day he couldn't find his good bifocals?

[@ragnkja]

Why not? These videos are clearly products of curiosity - the same curiosity a scientist needs.

[@ThiagowwW10]

Could you make a video about the biggest star known?

[@Ignorantf00l]

Damn I still love globular clusters even they all look the same

[@ashwith]

Brady, after being surrounded by scientists for so long, has the thought of applying for a science degree at this point ever crossed your mind?

[@SEThatered]

Then he would not have time for these videos. That would be sad, although I must add that Brady is still free to do what he wants, after all the videos are free...

[@Tupster]

If you want to visualize the density as if you had infinite samples then the result is going to look like a blur.

[@persistentaura]

type in planets in globular clusters in google and you'll find a good article about it

[@tommos1]

OMGOMGOMGOMG a new DSV!!!!!

[@Rufeo0]

If the galaxy is basically a flat disc shape then why do we not see (with the naked eye) a visible band around the sky? Even more than that I believe the entire universe is thought to be basically a flat plane disc shape, we should also see a band from this? Is it just that they are far too far away to make a difference to the naked eye and only the stars that are very close to us are visible?

[@ashwith]

These videos could count as his reports :-)

[@davidsweeney111]

thank you

[@Stingra87]

Wake up, have a healthy breakfast of astronomical SCIENCE!

[@LittlePeng9]

Annotation at 0:52 says periodcvideos

[@nofacee94]

Also, no the universe is not in a plane like our galaxy, it is all around.

[@Ace0077]

not sure if it's possible to measure star density in the middle of the cluster, let alone there's no way in hell a planet could exist in such violent place, it must be very messy in there.... + a possibility of a black hole