I really love how much we can learn about such distant objects just from the light they absorb and emit. It'll never cease to amaze me.

I love this Messier object series. Your scientists seem to dread it and think "Ugh, what interesting thing can I find about this boring object?" but they never fail to find something fascinating.

@foowashere

2 жыл бұрын

Yes, I agree-sometimes the most interesting things are in the details of the mundane.

It’s amazing to see how much GAIA has changed astronomy. I remember at the beginning of this series, not knowing where stars were was a big obstacle. Now astronomers can just find all of the stars associated with a cluster with relative ease and do stuff like this.

What a pleasure it is to listen to someone who actually knows what they are talking about.

@billyhendrix5544

Жыл бұрын

Best comment on KZread 🎉

@flamencoprof

Жыл бұрын

@@billyhendrix5544 Steady on!

Now 108 is the only Messier object remaining

@forthrightgambitia1032

2 жыл бұрын

As someone who watched from the start, this is quite exciting.

@AdDabrowski

2 жыл бұрын

And M88

@uvofsam

Жыл бұрын

Only 108 is remaining now

Oooh nice astrophysical application of the Zeeman effect! Did a lab about it back in my Bachelor's but haven't seen it used in astrophysics before this. That's very neat!

Ah yes, Gaia numbers. Just casually numbering stars until a buffer overflow with the digits.

We all remember the event horizon telescope image of the super massive black hole, but can we ever get a better image of a white dwarf binary where one str is stealing mass from it's neighbour? The artists' renditions are great and all, but i've always wondered if they actually look like that?

@MountainFisher

2 жыл бұрын

Look it up on Hubble. With my amateur telescope I cannot see any white dwarf, need a big professional one and Hubble has seen a dwarf star stealing from its neighbor. Plus plenty of radio telescopes. Most stars are in binary systems. Perhaps up to 85% of stars are in binary systems with some in triple or even higher-multiple systems. Look at the handle of the Big Dipper, the 2nd star from the end. It used to be an ancient eye test as there are two stars there name Mizar and Alcor, but with my 150mm telescope at 125x I can see a quadruple system of stars.

I love this channel

Just subscribed to this channel, really informative. An astronomy channel that takes the viewer beyond the basics. Excellent, good stuff

Impressive how scientists know all these things.

I didn't know in Britain/Australia some people, maybe most pronounce Pleiades differently until now. In America it's usually plee-ades instead of ply-ades.

@rhoddryice5412

2 жыл бұрын

I wish in general we could be more true to the Greek pronunciations. Pleiades would be like Pley Ah dez (ey like in bay)

@Deipnosophist_the_Gastronomer

2 жыл бұрын

I don't think it matters too much. I'm pretty sure we can both understand each other enough to laugh at the pedants. :smile:

Strongly magnetic white dwarf with a red dwarf companion. Sound like this might evolve into a Polar! Those are extremely fascinating objects in their own right!

Interesting! Nice explanation of the paper :)

Very nice graph work. Can we get a glimpse into how things are plotted and graphed pleaseeeee Brady? I'm also from South Australia 230k from Adelaide xD

At uni my professor would demonstrate the strength of an NMR machine by holding his keychain by the 1T magnet: it had lots of keys and a Swiss-army knife, and it would deflect by a few degrees.

Thank you very much!

Thank you for the mass diagram ... before that I was wondering how there could be a white dwarf in a young star cluster.

New video let's go

Sweet. Thanks

Fascinating.

I think this is the list of remaining Messier object left: M61 - Spiral galaxy M72 - Globular M88 - Spiral galaxy M107 - Globular cluster M108 - Bared spiral galaxy

Amazing detective work - hats off to the scientists that have worked all this out over the last 100 years or so. Slightly puzzled by the bit at the end about the splitting of the helium spectral lines by magnetic effects. I thought that the point about white dwarfs was that they had run out of helium, and are mostly composed of carbon, oxygen etc i.e the products of fusion that this mass of star cannot further fuse. Is the helium detected just small traces left over, and even if it is, why doesn't it undergo fusion in the centre of this very massive if small object?

@thisnicklldo

2 жыл бұрын

@@mairiobrien7276 Makes sense

It doesnt cease to amaze me how much we can learn about the universe despite being stuck on this tiny rock!

the man said we can detect how long dwarf lived as dwarf (and thus the death date of the original star), but how precise was birth of that star dated? like "150million" plus-minus how much? and how much let's say 1 million changes the supposed mass of original star?

@MushookieMan

2 жыл бұрын

IIRC this all comes from the "cosmic distance ladder" and various physical models. I don't think it's very precise.

@NoNameAtAll2

2 жыл бұрын

@@MushookieMan distance ladder is about determining distance - it's in the name question here is more about time

@rhoddryice5412

2 жыл бұрын

Listen to the professor again.

@garethdean6382

2 жыл бұрын

The uncertainty in the dwarf's cooling time and the cluster's age combine to be a few million year's worth of uncertainty. This can be seen in the graph at around 4:40, where the error bars are marked out for every star. You can see it's significant, but not enough to obscure the general picture.

Made me laugh when Professor Merrifield said, "Stars never put on weight".

how do you know the difference between color of the star and velocity toward / away?

@rhoddryice5412

2 жыл бұрын

Every element got its unique spectral lines and they get shifted towards red if the object moves away from you and towards blue if it moves towards you.

no clue how i noticed the 3 birds fly by out the window at 8:33

@rad858

2 жыл бұрын

magpies!

why the massive star that shed outer layer have more magnetic power? is it because it spins fastter? I am asking that because you said massive stars will have smaler cores so that means when they get to be only core then maybe it spins faster because they are being smaler then typical.

@cemoguz2786

2 жыл бұрын

I am talking about conservation of angular momentum.

At 0:27, what’s the ring on the left of the screen?

@garethdean6382

2 жыл бұрын

A light artifact, you can see another one a little down and to the right, just touching the left side of the central star's horizontal bar.

@droppedpasta

2 жыл бұрын

@@garethdean6382 Thanks!

I get the impression Mike is slightly more intelligent than I am 😄🤪

سبحان الله وبحمده سبحان الله العظيم

Pulsars can have magnetic field of up to one billion Teslas!

@matgeezer2094

2 жыл бұрын

Yeah, neutron stars are utterly mental. I think they are more interesting than black holes personally, cause black holes don't give anything back (apart from accretion disks of course)

75million years I mean how do u fit all those candles on the cake😳

@rhoddryice5412

2 жыл бұрын

You have to make a big enough cake. =)

M-dwarf??

@simontmn

2 жыл бұрын

red dwarf

How can a 75 million old, 6 times the mass of sun star make a white dwarf? The limit is 1.4 mass. Everything above that is either neutron star or black hole.

@rhoddryice5412

2 жыл бұрын

Stars up to about 8Msun expands at the end of their life and throws of a lot of mass. In the end only the core is left and slowly will cool down. Above 8Msun the pressure isn’t enough and instead it collapses and explodes throwing away excess mass and forming a neutron star or if heavy enough a black hole.

@TheLonelyTraveler142

2 жыл бұрын

The Chandrasekhar limit is a limit on the mass of the white dwarf, not the mass of its originating star. The white dwarf is only a small portion of the star's mass

@theserbian

2 жыл бұрын

@@rhoddryice5412 I thought I knew it all. Thanks for the clarification!

@theserbian

2 жыл бұрын

@@TheLonelyTraveler142 Thanks for the answer!😀

@matgeezer2094

2 жыл бұрын

I knew a star lost mass in the planetary nebula phase, but I didn't know it was so much

How can an average Joe get these papers without paying a bunch of money for them? Like a monthly subscription?

How does a star start naturally when we can't make one, can't be hard😳

@ryanchan153

2 жыл бұрын

compression of gas clouds

@Deipnosophist_the_Gastronomer

2 жыл бұрын

Well it's not so much a science problem as an engineering one.

Ok I've watched this vid a few times like all the others on this channel, Brady. And what a masterpiece! Amazing that a dim lil thing like a white dwarf is perceptible to a relatively dim satellite like Gaia! 🎉 So cool! And it might just be an imaging aberration, but seems like you can almost see the companion in that imagery! 🥰 Wow so cool!