Stars: Crash Course Astronomy #26
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- čas přidán 19. 06. 2024
- Today Phil’s explaining the stars and how they can be categorized using their spectra. Together with their distance, this provides a wealth of information about them including their luminosity, size, and temperature. The HR diagram plots stars’ luminosity versus temperature and most stars fall along the main sequence, where they live most of their lives.
Check out the Crash Course Astronomy solar system poster here: store.dftba.com/products/crash...
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Chapters:
Introduction: Stars 00:00
Stellar Spectra 1:07
Star Classifications 3:03
Why Are There No Green Stars? 4:00
Luminosity Depends on Size and Temperature 5:27
The HR Diagram 6:33
Main Sequence Stars 7:27
Other Stars on the HR Diagram 8:17
Review 9:50
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PHOTOS/VIDEOS
Stars www.nasa.gov/images/content/70... [credit: ESA/Hubble & NASA]
Spitzer Spectrum www.jpl.nasa.gov/spaceimages/d... [credit: NASA/JPL-Caltech/Leiden/SRON]
Sun spectrum www.noao.edu/image_gallery/ht... [credit: N.A.Sharp, NOAO/NSO/Kitt Peak FTS/AURA/NSF]
Annie Jump Cannon en.wikipedia.org/wiki/Annie_J... [credit: New York World-Telegram and the Sun Newspaper]
Cecilia Payne-Gaposchkin en.wikipedia.org/wiki/Cecilia... [credit: Smithsonian Institution]
OBAFGKM www.noao.edu/image_gallery/ht... [credit: NOAO/AURA/NSF]
Betelgeuse www.eso.org/public/usa/images/... [credit: ESO/Digitized Sky Survey 2. Acknowledgment: Davide De Martin]
Sirius www.nasa.gov/multimedia/image... [credit: NASA, ESA, H. Bond (STScI) and M. Barstow (University of Leicester)]
Solar AM0 spectrum with visible spectrum background commons.wikimedia.org/wiki/Fi... [credit: Danmichaelo, Wikimedia Commons]
Blue sky www.pexels.com/photo/sky-sunny... [credit: Skitter Photo]
Hawaii sunset photo [credit: Phil Plait]
Hertzsprung-Russell Diagram commons.wikimedia.org/wiki/Fi... [credit: ESO]
19 years old and I've finally learned the age old question, "Why is the sky blue?" this is amazing
You're a star, Phil.
😂i was looking for this comment
Oh wow XD
No if he was we'd most likely be dead right now.
Psychedelic Toaster common dude 🙈😂
YazeedSaber what happened to the other guy??
Phil you did in 10 minutes what my physics teacher could do in 4 hours ☺
I mean he didnt go over the math at all. Just did a quick overview
say 4 months...
@@sadmanpranto9026 do you even think they will do in 4 months bit less 4000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 years
The editor did a stellar job. He is definitely the star here. I just wish it wasn't so bright.
blackmesa232323 i see what you did there
blackmesa232323 his work shines through
sharon I bet the office he works in is super hot.
blackmesa232323 it must be colored blue
I hear he’s a bright guy. He makes these long video in a flash
the diagram shows how stars die. so it's actually a dieagram?
OBAFGKM: Only Bad Astronomers Forget Generally Known Mnemonics.
Nillie Oh don't be a salty girl, or you won't get kissed ;)
...OBAFGKMLTY?
BullShitThat "Later, Thank You"?
Nillie That kinda works for the old mnemonic, but not the one you're using.
BullShitThat I know. =)
Only Boring Astronomers Find Gratification Knowing Mnemonics.
I could watch Phil talk about astronomy all day long!
nicjasno Well one episode is about 10-15 minutes long so wouldn't it be around 120 episodes for you to be able to watch him all day long?
*OR* 60 episodes but you watch them at 0.5x the speed. Damn I'm such a freaking genius. You can thank me later.
nicjasno What's weird is that he looks exactly like my old Algebra teacher, but yeah, good stuff.
And I'm actually doing it...
same
Yea and you wouldn't learn anything, this is way more entertaining than it is informative
The intro was so freaking creepy!
"Oh... I know who you are..."
no need to curse
Khalisa P “freaking” is not a swear word
@@NemieShakingson bruh why is this thread so dang slow?!?
@@lfh950 I'm sure you're also one of those ppl who doesn't mind a bit of death and destruction in movies but goes crazy about a naked boob. Sod off.
i hate it but ahhhhhh i dont know (i like the video because of it) I'm sorry
Annie Jump Cannon. Possibly the best name in history.
I love those Kerbals on his table XD
Lord Zephyros ~200 bucks, theyre 3d prints
Lord Zephyros
Adrenolex well in total that is
Nick baker Me too :D
So she was named Annie Jump Cannon? Are we sure she wasn't also a superhero?
or a pirate
Arturo Gutierrez or a circus performer (shot out of a cannon)
Or the name of a band
Alfredo Marquez Not only is it an awesome name, but it was the product of pure serendipity as well. Her father's last name was Cannon, and her mother's maiden name was Jump.
Alfredo Marquez Whatever she was, she surely jumped the gun...
As a non-native english speaker, I had no idea Betelgeuse is pronounced "Beetle-juice" in english.
In my language(Russian) it's pronounced "Betel-gay-ze""
May you spell it is Cyrillic please?
Бетельгейзе
Hideki Hoshino Спасибо
It's actually an Arabic word,only the Arabic pronounciation is really correct,.
And how is it pronounced in arabic?
These astronomy videos, are some of the videos on youtube I absolutely look the most forward to! I am getting quite a strong passion for physics and especially astronomy, and these are great to help improve and brush up some of my knowledge on the subjects! Keep it up!
"There are no green stars. Look as hard as you want, and you won't find any."
-Me in Super Mario Galaxy 2
same
I keep coming back to this video! I just adore stars.
James Madison bro I am cramming on a test about u smh
singsinging sang I'm pretty amazing.
James Madison ur ruining my life
Nah I'm just playin
Anyone watching this during the 2020 lockdown?
Without a doubt, one of my favorite topics in astronomy. I can't wait to see all the remaining detail. This is basically the topic about the ultimate ancestors of all life on Earth. And Earth itself.
"For Science!"
XD
Arturo Gutierrez i laughed pretty hard there XD
I had to pause the video to laugh lol
"The Astronomical Unit"
This is seriously my favorite topic in astronomy. And I'm so glad you are making whole series on astronomy. I'm gonna watch it even when I'm on my death bed :) and my friends and family are going to tease me and call me geek/nerd.
red stars are cool
i was looking for the planet Vegeta video
The red star isn't going to help you beat Superman.
hksin11186 beating kakarot is my priority
Vegeta
Good man. You handle him.
I'll look after your wives.
Vegeta retards are cool
I'm a truck driver I was just curious the distance of the Sun and the Moon related to the Earth this channel rocks I had to subscribe
I'm just glad to hear there's going to be more episodes!
I've been interested in astronomy for well over 10 years now and yet I've learned a bunch from this Crash Course series.
Keep making them and make them long!!
"On a brighter note,..."
No one else catch that? No?
A funny tease about Annie:
Annie jumped into a cannon and got shot up to near the sun where she discovered that the sun emits different colors than other stars cuase of spectra!
A year after my degree in Astrophysics these videos are a great way to make sure that I remember some of the keys facts that are a part of this amazing subject! Thank you!
I finally understood what Main Sequence meant when I play Spore.
These videos are such a big help for my astronomy class. You basically covered all the topics I need to study from my chapter.
Finally! Someone answered “why are there no green stars?”
Another interesting video, I love this series. Keep them coming!
Thank you so much for this series! I'm taking a random astronomy class and you explain things simpler than my professor does! EVERYTHING MAKES SENSE NOW
I love your videos Phil! It's great to learn so much from somebody with so much passion about the subject. Thanks
Keep teasing as much as you want as long as you keep making videos FOREVER. I love this series sooo much. Great video!
"Jump Cannon" is easily the second-most badass name I've ever heard. It doesn't even sound real!
looking forward for the next videos!
By far the best series on astronomy on CZcams!!!
I got into astronomy at a young age. In senior year, I used to watch astronomy videos everyday. AWESOME CONTENT IN THIS SUBJECT!!! What's even better, crash course makes astronomy even more interesting. Thanks crash course
Wow, this was an incredibly informative video, probably the most informative 10-minute video I have ever seen! It helped me understand a whole chapter for my science test, I couldn't thank you enough for making this video.
Wtf happened to the exoplanet episode?
Dexter Armstrong We overlooked an error in the segment on reflexive motion that proved too large to simply annotate, so we decided to pull the episode to correct it. Unfortunately now everyone has to wait an extra week for all that exoplanet goodness. SOON, FRIENDS. Soon.
-Nicole
Oh noooo, but thank you
***** get rekt dude
CrashCourse you just ruined my life :(
+bjshnog You touched yourself, that's why :v
1:06 that... sounded crazy with headphones
I love the representation of female scientists in this video! Yay for women in science!
-Rose
That’s cause they actually did something.
Actually, women are quite good at science, when they bother learning. Ada Lovelace and Marie Curie came to my mind!
CrashCourse definitely keep including more of the history/methods of astronomy in the episodes! It's making them much more digestible than some of your 'objects of our solar system' videos which had little to none.
I wish Crash Course Astronomy never ends!
I look forward to this series every week!
I really enjoy watching these videos. You the man Phil
I'm taking Astronomy 115 as a college freshman, and these videos are how I study for my midterm on Friday! Thanks so much
this has to be my favorite crashcourse, phil is just awesome you can really sense how much he loves science and astronomy, plus he's such a great narrator and great at explaining everything without dumbing anything down, easily one of the best things i look forward to each week, thanks for all your hard work!
This helped me so much to understand stars. I have a sub for science and we only learn from the textbook, which is clear, but I got confused when the sub kept on messing up what she was saying. Even after almost five years this video’s still helping people!!
I love this course so much! And Phil!
Phil--your limitless passion for Astronomy is ever-appreciated.
I love this series so much!
He is just amazing.
Make things super easy.
watching the series a second time, about a year down the road. Amazed at how much I'd missed the first time around. Definitely worth re-watching (at least for me :) )
Ton of really cool information in a very concise vid. Thanks!
amazingly beautiful video. Thanks Prof
Thanks for posting this informative course. Stellar performance by Phil Plait.
This was a fantastic video, Phil!
I always love hearing about all the brilliant women that were such strong forces in earlier astronomy! :3
Explaining things for surface information lovers. For those who do not concern themselves with in-depth knowledge, this kind of video is very fulfilling.
Amazing opening. Probably one of my favorites. Seriously
Awesome series appreciate your efforts.
You are the best. I love learning from you because you have the best teaching style for me so when I grow up I have more experience of how astronomy works because of your amazing teaching.
Love having breakfast in front of crashcourse, dunno why :p
You got a little Heisenberg on that opening shot! Thanks for taking the time on this subject, it was definitely worth the full episode. Looking forward to the future star talk. Thanks!
Great crash course. Very clear and articulate.
Thank you this helped me a lot and learned more things about stars and their luminosity and temperatures. sadly there are no green stars and gree is my favourite color. but the whole video is so good
this is my fav youtube show thank you so much 🔮
Thanx man! u are helping me study for my final with all the cool vids 😎.
That intro made my night! Super funny! I can only hope for more :)
*_What a thumbnails you pick for you videos, amazing... Wonderful thumbnails_*
Your awesome Phil! Ty for all you do; I've home schooled for two years and this was my first year using you! I wish I found this sooner. WOW your awesome! I've always loved astronomy; but now i love it even more!!!! thank you for all you do I appreciate you soooo much!
THANK YOU PHIL!!!!!!
Sincerely,
Brianna :)
i gotta say i LOVE THIS SERIES SO MUCH!!!!!!!!!!!!!!!!!
I love learning from Phil
I can't thank you more, I really learned a lot from my quizzes!
Wish me an A+
I love this series!!!!!!!!
This serie is awesome!!
The intro got me hooked I already like this guy !
And congrats on the 6M subs
Thank you very much for making this video, Phil Plait and _CrashCourse_ Astronomy! Yeah, I imagine that this is a very handy tool when obseriving the sky with your telescope, critical to determining what you’re seeing. Thanks!
I do have the same question as I had last time we talked about this topic: what if the light emitted is compensated by the temperature of the star? How do you tell the difference between a very hot star far away and a cool star close nearby? Will they look the same? I know, you could of course tell by the size but I imagine that would also be compensated by the distance.
*hand waves* Triiiiiiiiigonooooometryyy.
(Which is a very very simplified way of summing up a whole bunch of math and physics! It confuses me too, but this is a decent looking page on Stack Exchange that might help, if I understand your question correctly?)
I can't believe that I'm just running into this for the first time. This is a great series.
I love this show. Thks, CC.
you guys are awesome! Keep it up!
Will you be discussing about a star's composition in a future episode? If so will it touch on the star made of diamonds? Thanks for putting on a great show!
Really cool episode.
Such a sick video! Light is so interesting!
The Animated Phil and his tiny star costume is so adorable, and when he squints his face at the same time the real Phil does, is so adorable.
I love this, I can finaly wear my hat while learning
Wow it is the best explaination what I saw thank you @CrashCorurse
"Twinkle Twinkle Little Star, oh I know who you are!!" was sparkling , our star Phil.🌟🌟
such an interesting topic Phil!!!
i'm literally watching these videos on repeat tryna cram for my cosmos final tomorrow. this is so helpful
Phill did you hear NASA found a new planet that is very much like Earth!?! Astronomy is so awsome! Thank you very much for this CC! It really got me so hooked into the subject!!
Mauro De Simone, We don't know wether or not any of the exoplanets that have been found are really Earth-like, but it's theorized that at least 6 of the planets we've found are like Earth, possibly with living things
Will you guys talk about star-quakes at all? I've heard that they can be in the thousands or even millions or higher on the Richter scale, and that just...blows my mind.
I've seen the episode of Cosmos on Cannon's findings and she is soooo great
Excellent episode, don't take too long to go into the stages of a star life/fusion cycle
oh! I love the way he started this video.
Hola aprecio mucho sus videos son excelentes y plasma conocimiento científico complicado en maneras sencillas de entenderlo. Sus videos y cursos son una verdadera joya, muchas gracias
hooray! I can't wait for these videos!
I came across this video and I stayed only to feel so good when I reached 9:51 where he recaps what he taught today.
5/5 stars rate my friend!
You are so good at explaining stuff
U guys really helped me this is really gonna help me on my project