The Sun: Measuring and Understanding the Closest Star

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Жыл бұрын

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This is the sixth lecture series of my complete online introductory undergraduate college course. This video series was used at William Paterson University and CUNY Hunter in online classes as well as to supplement in-person course material. Notes and links are present in the videos at the start of each lecture. To begin with, I chat about the bulk properties of the Sun, and some other interesting factoids. Mass, Volume, Density, Temperature, and other things that relate to the Sun as a whole. Next, I’ll teach you all about what the Sun looks like! Prominences, Flares, Sunspots, Ejections! It's a much more active place than you think. It's also mesmerizing, like looking at a fire while camping. After looking at the outside, we go inside, discussing the core of the Sun and its conditions. The core of the Sun is where all of the action begins. It contains the conditions we find in all stars on the Main Sequence. Next, we look at how energy moves around in the Sun, and take a peek at the basic equations of stellar structure. This section lets us know that one day, the Sun will stop shining. That begs the question of exactly how the Sun shines, and how long it will shine, as well as some of the great questions of 19th century Physics. We'll also see what your smile looks like when you get a Nobel Prize. Finally, I discuss how the Standard Model of Physics was tested, and how the existence of fusion in the core of the Sun was actually determined. This led to two Nobel Prizes, and a lot of dry-cleaning fluid down a deep, deep hole.

Пікірлер: 47

@JasonKendallAstronomer 2 ай бұрын

Please see the updated version of this video here: kzfaq.info/sun/PLyu4Fovbph6cymcMLqLcKo-xpaM3uABnc

@fratercontenduntocculta8161 4 ай бұрын

I’m so happy to live in an era where education is a form of entertainment!🎉 Thanks for making this lecture for us.

@JasonKendallAstronomer Жыл бұрын

Enjoy! I needed to make some edits to this video and re-upload as HD. I hope you like it!

@trevorvanbremen4718 Жыл бұрын

I got a big 'deja vu' watching this... (I'm pretty certain I've watched each 'chapter' independently). Since you've stated your intent to make edits, do you want us 'mere mortals' to point out any tiny 'accidental' slips we come across? For example, at around 3:10:45-ish you mention 1/3 missing when it's actually 1/3 present and 2/3 missing. Any logical / thinking person will KNOW what you actually meant (especially if they'd watched the video up to that point... LOL). I've found that _SOME_ video authors appreciate the feedback as it helps to further 'polish' their presentation, while others are somewhat defensive. (If you DO want such input from us 'mere mortals', do you want this across ANY of your videos, or only those where you state you intend editing?) P.S. As always, another WONDERFUL (albeit rather long, LOL) video. I tend to watch these long videos one 'chapter' at a time. Thank you sir!

@jimsteen911 Жыл бұрын

Man I’d love to see some content focusing on all the open questions and problems remaining to be solved in solar physics. Some say MHD isn’t sufficient to describe likely high energy plasma physics processes within the sun. It would seem to be true considering the trouble we have in computational modeling of sun spots and other processes. I heard by a reputable lecturer that they have to cheat by adding parameters and literally “pinch and pull” the surface in order to get anything approximating sun spots. The solar heating problem is also fascinating. I must admit I have a hard time finding resources and lectures on these topics; it also would appear solar physics isn’t exactly attracting the fresh talent! Lol I’ve taught myself a lot following a deep hunger for answers and understanding of astrophysics-which necessitates all of physics. I can’t get enough of it; I build houses during the day and I’ve been told I’m a weirdo bc all I watch and consume is lectures on these topics. But I must say I want to go further and learn the math. However, I come from nothing but poverty and willpower and thus I don’t know where to begin. I suppose I’d have to go all the way back to fractions and algebra? To really get myself back to where I was in high school? I was curious Mr Kendall if you know of good resources one could use to teach oneself? I’d like to get to a place where I am fluent in orbital mechanics, geometry and Relativity-and anything else i would need in order to get into Bloch spheres and conformal field theories, QFT…. I have about as deep an understanding of all of these conceptually as I can go without the math… it’s frustrating not knowing where to begin… where theres a will, there is a way… just wondering! thanks for posting sir, always enjoy your videos.

@JasonKendallAstronomer Жыл бұрын

@jimsteen911 : Admirable goal! Frankly, it's important to know that math is like a muscle. You need to wrestle with it quietly, and on your own. And you need a coach to help you get through blocks. Almost no one learns math without doing math. One can learn physics by attentively hearing the arguments, but the language of math is how nature talks. The words you hear in videos like these are the result of analogizing and naming-and-labeling things and processes. But until you get into the real weeds of it, as well as understanding statistics, you'll know the current paradigm, and you'll be able to converse like that, but your insights won't make sense unless you see what exactly is being analogized and named-and-labeled. Get a good college intro calculus book, like Swokowski, and start from there. Don't both with videos. Or take a corsera class on calculus, and take all the assignments seriously, like you're back in college. As Euclid wrote, "Sire, there is no royal road to geometry."

@JasonKendallAstronomer Жыл бұрын

@trevorvanbremen4718 : it never hurts to get tips and notes. The videos are long enough that One Day, I'll need to do a Full Revamp. Start to finish...

@michaelccopelandsr7120 Жыл бұрын

Thank you

@GameplayReviewUK 4 ай бұрын

Excellent summary of our current knowledge of the sun, thank you for making this

@anotherplatypus 5 ай бұрын

1:41:30 I love that analogy... I had a chemistry professor explain how she saw romantic relationships, attachments with friends, family, coworkers, enemies, and strangers as symbolic to all the different types of chemical bonds we were learning... it was so funny to hear her explain her divorce because it made so much sense from her perspective by that point

@terrylyn 3 ай бұрын

These are incredibly interesting lectures, thank you for uploading.

@JasonKendallAstronomer 3 ай бұрын

You're very welcome!

@anotherplatypus 10 ай бұрын

Your videos are so dope. Listening to an educator who's refined their presentation is so different to KZfaqrs who write scripts, record, and move on. = )

@JasonKendallAstronomer 10 ай бұрын

Thanks very much!

@EVILJAMARR 4 ай бұрын

This video perfectly outlines why Dyson Spheres/Swarms are a ridiculous idea, which is why we don't see them at use in the galaxy.

@tradtke101 Жыл бұрын

Thanks so much for all your hard work, professor! It's really been a joy to learn from your lectures. I was wondering what you think about the future of gravitational wave astronomy... Do you think it's going to be the next big thing? Will our grandkids be building mail-order gravity interferometers in their backyards while we say "back in my day we couldn't even see the other side of the daggum' Milky Way" while the kids roll their eyes at our ignorance? Or does the real future of astronomy lie in a Stupendously Hilariously Impossibly Titanic Telescope? Should more research money be directed towards more clever and subversive backronym development?

@rpetersobr Жыл бұрын

A lecture. That's why it's exhaustive(long). Good stuff. That's how ya learn alongside rooting up the tubers yourself...

@elfootman Жыл бұрын

Your videos are amazing, very complete with no fear of showing the math... but, but... they are so long!

@judemeche 5 ай бұрын

Looking great

@A.R.00 2 ай бұрын

Our Star

@iMannyFest Жыл бұрын

Thank you very much.. I love your content please keep up the good work. 🇬🇧🇯🇲

@leejenwin1937 3 ай бұрын

Hope you got to observe today’s eclipse! Curious a-shape (or rather v-shape) prominence in the lower edge during livestream of totality..

@322messenger 6 ай бұрын

It doesn't matter how fast an airplane is flying, it will always take 1 year for a plane to fly around the Sun!☀️

@tommytom5650 Ай бұрын

Neil Degrasse titan did not notice the “Manhattan henge” first nor coin the term it was local New Yorkers that did both.

@SirDeadPuppy Жыл бұрын

awesom!

@JasonKendallAstronomer Жыл бұрын

Thank you! Cheers!

@Spy653 2 ай бұрын

you continuously refer to the sun as being made of gas, is this just ignoring plasma for simplicity in an introductory course or is there something I've missed?

@householdemail1305 5 ай бұрын

I studied it and more in high school…

@davidsabillon5182 11 ай бұрын

Like commented and subscribed 👍

@johnmagnotta8401 2 ай бұрын

How long to get around the sun going 600mph.. is this a trick question? You'd find the circumference.. then figure out how high you'd have to fly so you and the plane won't melt.. then do some maths and eureka.. but hold on.. with the mass of the sun being considerably larger than the earths.. wouldn't that also effect time? Time is slower the closer you get to the center of an object.. (in a plane a clock runs faster than when landed on the earth) so, do you want the time with just the numbers of how many miles divided by speed of the plane using earths number or do you want the effect of the sun's mass on time then using that calculation.. ?

@rudolfsykora3505 2 ай бұрын

Why can people see northern lights with naked eye in Belgium these days? Is it the sun itself, or its magnetic field of our planet ?

@leestimpson1838 5 ай бұрын

It would be nice if you could break down your programmes into three or four episodes.

@JasonKendallAstronomer 5 ай бұрын

They already are. Please check out the playlist: Module 6: The Sun kzfaq.info/sun/PLyu4Fovbph6cymcMLqLcKo-xpaM3uABnc

@libra7624 5 ай бұрын

sunology

@DontKnowNoSnakes 5 ай бұрын

2:23:00 Janet Jackson song!?

@JasonKendallAstronomer 5 ай бұрын

As a child of the 80’s I hang my head in shame. Paula would be quite sad.

@DontKnowNoSnakes 5 ай бұрын

😆@@JasonKendallAstronomer , please understand this was not my only takeaway from your massive and highly informational video. Keep up the good work.

@JasonKendallAstronomer 5 ай бұрын

Of course! It is one of many tiny fixes when I redo. Perhaps I’ll quote Cunk and use Technotronic some where.

@anotherplatypus 2 ай бұрын

i followed gpt2 since before launch and those sun spot ejections ruined the experiment

@anotherplatypus 2 ай бұрын

They were measuring Earth's frame dragging effect and suddenly had to deal with every component of every cuciut firing off because of a sun flaire... it was heart breaking

@anotherplatypus 2 ай бұрын

they designed the experiment to give the data to everyone but it was useless after that

@EllyTaliesinBingle Ай бұрын

@@anotherplatypus aw that sucks

@hherpdderp 11 ай бұрын

When you say 10x smaller, what does that mean? 0.1? Can we call the Sun a Proton Star?😁

@user-vp6gn4xl6n 7 ай бұрын

Привет

@thorddespace2773 5 ай бұрын

Hm! The mass of hydrogen gas becoming the Sun would not begin to glow before after a billion (1000 000 000) years' wait by studying Bethe's proton assembly.