Binary and Multiple Stars: Crash Course Astronomy #34
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- čas přidán 26. 06. 2024
- Double stars are stars that appear to be near each other in the sky, but if they’re gravitationally bound together we call them binary stars. Many stars are actually part of binary or multiple systems. If they are close enough together they can actually touch other, merging into one peanut-shaped star. In some close binaries, matter can flow from one star to the other, changing the way it ages. If one star is a white dwarf, this can cause periodic explosions, and possibly even lead to blowing up the entire star.
Check out the Crash Course Astronomy solar system poster here: store.dftba.com/products/crash...
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Chapters:
Introduction: Binary & Multiple Stars 00:00
Visual Binary Stars 1:45
Spectroscopic Binaries 3:05
Multiple Star Systems 4:15
Eclipsing Binaries 5:44
Contact Binaries 6:53
Stellar Novae 8:31
Review 10:50
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PHOTOS/VIDEOS
Big Dipper www.deepskycolors.com/archive/... [credit: Rogelio Bernal Andreo]
Sirius www.spacetelescope.org/images... [credit: NASA, ESA, H. Bond (STScI), and M. Barstow (University of Leicester)]
Sirius A and B chandra.harvard.edu/photo/2000... [credit: NASA/SAO/CXC]
Clashing Winds (video) svs.gsfc.nasa.gov/cgi-bin/deta... [credit: NASA's Goddard Space Flight Center]
The Radial Velocity Method (artist’s impression) www.eso.org/public/images/eso0... [credit: ESO]
Mizar+Alcor commons.wikimedia.org/wiki/Fi... [credit: Wikimedia Commons, Thomas Bresson]
Polaris imgsrc.hubblesite.org/hu/db/im... [credit: NASA, ESA, and G. Bacon]
Does the Sun Have Long Lost Siblings? • Does the Sun Have Long... [credit: SciShow Space]
Clashing Winds (image) svs.gsfc.nasa.gov/cgi-bin/deta... [credit: NASA/C. Reed X-ray images courtesy of NASA/GSFC/S. Immler]
Artist’s impression of the pulsar PSR J0348+0432 and its white dwarf companion www.eso.org/public/images/eso1... [credit: ESO/L. Calçada]
Artist’s impression of eclipsing binary www.eso.org/public/videos/eso1... [credit: ESO/L. Calçada]
Artist’s impression of the yellow hypergiant star HR 5171 www.eso.org/public/images/eso1... [credit: ESO]
Nova www.nasa.gov/centers/goddard/n... [credit: NASA, Casey Reed]
Artist's impression of RS Ophiuchi www.jodrellbank.manchester.ac.... [credit: David A. Hardy/www.astroart.org & PPARC]
An artist's impression of Sirius A and B www.spacetelescope.org/images/... [credit: NASA, ESA and G. Bacon (STScI)]
Artist's impression of vampire star www.spacetelescope.org/videos/... [credit: ESO/M. Kornmesser]
Type Ia supernova svs.gsfc.nasa.gov/cgi-bin/deta... [credit: Walt Feimer, NASA/Goddard Space Flight Center]
Every school should show this series to the students, and every science teacher should wear cool shirts like those Phil uses.
+ComandanteJ Thanks! :)
+ComandanteJ I agree. That shirt was glorious.
+TheBadAstronomer what would happen to the star that doesn't blow up? does the explosion make it fly away?
Alexander Korotkov I'm guessing that if it's close enough to be gravitationally bound, it probably gets blown away by the blast, stars are not very dense on thair outer layers.
+TheBadAstronomer I have easily learned more through Crash Course then i have in my entire secondary school emotional grind fest... I just wasn't into school i guess :p wadayakno... people are interested in learning there own way, wait what! pressure and stress leads to disinterest? :O comfort is the key? What is this nonsense! you get my point ;p
Our sun is social distancing because of its corona.
I'm going to miss this series when it's inevitably over. It's by far my favorite Crash Course.
+PogieJoe I don't even want to think about that!
+PogieJoe Then Crash Cousre Physics will start!
+PogieJoe when do you think it will be over?
Oleksii Kolesnikov I think they still need another $7k or so a month to consider that according to them.
Lunos XV I don't know but there can't be too many basic space topics left to talk about. Then again, maybe Phil will surprise us. :D
PogieJoe
if they run out they could just do revamps of old episodes.
_"This makes them very important indeed, as you'll see in a future episode"_
Oh Phil - you tease, you.
+13ullseye My thought exactly... he enjoys this too much.
+13ullseye an episode about a star eating mass and exploding into a bright object visible across the observable universe? Has to be a quasar episode.
+13ullseye I'm sure Phil made every episode in this series planning to build a giant interconnected web of advertisements for both previous and future episodes.
+13ullseye Standard Candle :)
+HexerPsy yup
Our sun: “I like being a bachelor.”
It doesn't trust others to take care of our planet.
Nah. It got divorced and got all the kids. It's especially fond of Saturn and Earth . Saturn is very artistic while Earth is extremely creative and mature
Kudos to the photographer who took time and went in space to take these amazing pictures
our Sun is in long distance relationship :P
7:15 "This can make things really weird for them."
I smell a sitcom...
Imagine living on a planet in the habitable zone in a sextuple star system
I highly recommend the Isaac Asimov story "Nightfall" if you want to take a deeper dive into that concept. One of the most haunting sci-fi stories I've ever read. The expanded novel is also worth it if you enjoy the story.
@@w.kelleyobrien459 YEEEESSS that's exactly what I thought of! I at first thought that couldn't be a thing, then I found out that Castor (of Castor and Pollux) IS a sextuple star. I don't know how likely a stable/habitable orbit around such a set would be, but...
@@w.kelleyobrien459 ah damn it I was gonna say the same thing. U beat me by 11 months
You probably wouldn't be able to sleep.
Yep it would be cool
I wish these videos would get MILLIONS of views.
opsimathics
Why?
Don’t you mean Billlions and Billions
it has 1 million
I love Phil's obvious passion for the subject matter...reminds my of a speeded-up Carl Sagan
"Used as eyesight test in ancient times"
Imagine one of then has better eyesight than the other and both be like "THERE IS A SECOND ONE CANT YOU SEE IT?"
-"nah you're just crazy"
From CCA 31: Outgoing neutrinos slams into the star's outer layers and blows everything outwards, and the star explodes.
From CCA 34: Extra gas from a companion star gets dumped onto a white dwarf resulting in carbon fusion, and the star explodes.
I'm starting to see a theme here...
Well, they are incomprehensibly huge nuclear reactors with no safety mechanisms.
+DynamicWorlds but it shouldn't matter about safety because the effect it reaches and the space it sits on is 'preety safe'.
+Ganaram Inukshuk _______________, and the star explodes.
Stars and RBMK reactors appear to have much in common.
Excuse me while I clean my brains off the wall. My head went supernova
I just went on a CrashCourse Astronomy binge watch!! Thank you so much for your videos, after the lunar eclipse this past weekend, I was excited to learn more about the sun, the stars, and our universe :) thanks for your hard work on these videos!!
Probably one of my favorite episodes yet. I've known about multiple star systems, but learning about contact binaries and the stellar novae at the end was really cool!
Hooray for standard candles!
+Matthew Prorok That's what he was talking about at the end right? Type 1a supernova.
+Justifyed Mattitude No. Quasars last far longer and are related to black holes.
+Justifyed Mattitude A standard candle is the type of super nova mention in this episode, is used to measure distances in the universe... A quasar on the other hand, is total different beast, it involve a super massive black hole, and while a super nova can outshine a galaxy for a few moments, a quasar can do the same for years even millions of year, they are the most powerful thing in the universe... they are just mind blowing...
+Matthew Prorok Yeah, my candle uses carbon and hydrogen, too. I hope it's not thermonuclear though. I really do.
Penny Lane
There's an easy way to tell; stand in the same room with it. If you're not reduced to a smear of plasma then it's not thermonuclear.
Ms. Simon's Earth Science Class (8th-9th grade)
This is one of my favorite episodes. It made me think about planets in binary systems. A sky on a planet in a multi-star solar system would be amazing. There would be periods in the year where the other stars were closer and farther away or parts were there was no night because both sides of the globe would be cast in light. If the planets had moons they might have a constant shadow moving on the planet until it got out of that zone; maybe even a couple weeks of solar eclipses over and over again.
So many questions! Would some days be longer from the tidal effects of the other stars? How would comets and asteroids react in that system? How drastically would temperatures change on the planet as its star orbited around the others, if they would change that much at all?
I love astronomy because there are still so many questions to be asked, and with every question answered ten more take its place.
Rochelle Mann 9th grade
One of the best things about our infinite universe is that there are countless objects for you to make CrashCourse Astronomy videos about. Well done yet again!
Some day my brother came to me during dinner and he said: Fill plate. Then, as I was talking I found out that we were talking about two different things.
Thursday is my favorite day of the week.
Also, hurray for next week episode on star clusters!
6:30 'When the fainter star goes behind the brighter star, the light hardly drops at all' The graphic is showing the opposite, or am I missing something here?
This series keeps getting better and better. So interesting!
ooooh boy, oh boy, oh boy!
I've been waiting to hear about Binary Stars ever since this series started!!!
Phil Plait you are surely one of my idols of all time!
Surprised there was no star wars joke, what with the iconic binary sunset
I have to say, astronomy is by far my most favorite crash course. especially the last 5-7 episodes were super interesting!
Please do another crash course astronomy. I know you already finished filming this one, I don't want the episodes to end..
So interesting! :D
+Haise Leonhardt Agreed.
Phil, you absolutely crushed this episode. Keep up the great work!
I find it amazing, this video isn’t that old, from 2015. Phil talks about how we may never find any of the sun’s siblings....yet here we are only 3 years later and we’ve found not only a sibling, but a twin.
This is by far the best educational series for amateur astronomers.... Thanks
These videos have been absolutely amazing. Thank you so much to everyone involved
I love this series, I was litterally smiling through out the entire episode :) Thanks Phil! You make my day, on every release day :p
+TheBadAstronomer another awesome show, keep them coming! You're definitely a true star of this channel.
Have to say I appreciate the awesome content of this video, made even better with all the Kerbals in the background.
Maybe it's the bigger subjects and going deeper into space, but it feels like each new episode is better than the last! And the first was already awesome, so by now it's off the charts! :D I love it!
Thank you really much for making this episode, Phil Plait, Aranda, Sweeny, Thaller and all the others at _Crash Course_ Astronomy! Yes, indeed, binary stars are important are really interesting...fascinating! I was actually quite surprised to learn that a such large portion of the stars in the Universe form a multiple-star system: one third! Cool.
So, if matter is transported from one star to the other slow enough, theoretically, the stars in a recurrent binary system could live forever? Nice! Eternal life due to the strange properties of the Universe.
Great series. My thanks to the whole crew
"all of it"... that may be my favorite quote from him.
0:05 the look in his face if you pause is astronomical compared to the seriousness of his face
Excellent. Thank you PBS.
What an explosive episode :P I very much enjoyed this one! Gets better and better!
Crash course astronomy is my favorite! You rock Phil!
It seems like every episode, he hints towards more in a future episode.
I hope this series never ends...
I really really enjoy how this information is presented. Thank you
This series is wonderfully amazing!
That was one of my favorite episodes, and i wasnt expecting it.
This series is just spectacular. Just...grrarhadgrht! Can't wait for the next episode.
Great job, love these episodes
"A lot of stars travel the universe with companions" So basically stars are the Doctor?
@ 6:27 Phil says "when the fainter star goes behind the brighter star, the light hardly drops at all" ... but the graphic in the video shows the bigger drop in brightness!???!!!
So either Phil is wrong or the graphics (credit: ESO/L.Calcada) are wrong ... I'm guessing the graphics ...
Learning so much from this series.. Loved this series.. Super interesting..
Could you do one episode on the most weird star systems? I'd love to see you go up from binairies to quintuples and all the weird interactions (mass transfer, orbits) they must have.
We've marked the episode that taught me something I didn't know. Best one yet!
great episode. this is one of the few vídeos that actually teach me something new
The animations are really great. Keep it up guys.
i really enjoy this series keep it up guys doing good work
Wonderful series, Thank you!!
You guys are awesome, thank you so much for making these videos
I love this channel. I've been binge watching so many episodes I feel like my brain is going supernova!!
Amazing information! Super interesting! And you are such a great and enthusiastic narrator!
hmm, all the sources I can find say Polaris is a 3-star system, not a 5-star one
+Nikolaj Lepka A couple of places mentions two more distant companions.
I really enjoy your videos! Keep it up!
this episodes are getting better everytime wow!
Without this I would never be able to pass astronomy thank you !
This is one of the best episodes yet.
This is probably my favourite series on YT right now. =D
I can't believe you write these episodes AND convey them with such enthusiasm. This is one of the BEST astrology (jk jk astronomy) shows I've seen!
MY favorite Crash course!!!
You totally earned your thumps-up and subscription.
PBS are the best.
Never end this show, ever. Thanks.
Mike Orr too late
This was a year and a half ago. "Never" still covers that I guess, but this is figurative speech in a CZcams comment section...
Other crash course channels are a bit boring but I LOVE CRASH CORSE ASTRONOMY!!!!!!!
Phil Plait is awesome
+Pavlock Productions So true.
So much to learn! I love astronomy.
I love this series.
Thank you for the subtitles.
8:55 Harry Potter vs Voldemort!
Which star is Harry and which one is Voldemort? I’ve never watched or read Harry Potter at all.
Really cool episode! awesome!
man i love you so much, i'm gonna watch this a 100 times its so useful thank you so much
These videos are a delight
Best CZcams series right here.
When you said that some stars travel with "multiple companions", my first thought was "those damn floozies!"
I'm not sure what this says about me...
this is the best series ever
Love this guy
great video as usual!
Type 1a standard candles next episode?? I really hope you find the time to do another series, Phil. So good!
This is my new favorite series
My mind got blown after this video 💥
I've learnt so much from this. The universe is so wonderful.
Oh my god that episode was a frikking rollercoaster of awesome :O
As always thank you Very much for the information
i just thought those last systems are like brothers arguing for something "give me that" "no it's mine" "but i need it more" "no you don't" and then it just breaks.
Great episode!
You never fail to amaze!
The animation of the eclipsing binary stars gets the dips in luminosity wrong according to what Dr Plait says while it is shown.
Based on what I saw the smaller star was suppose to be the one emitting more light while the larger one is emitting less. Size does not necessarily correlate to luminocity.
+Nillie No it isn't. The smaller star is the brighter star.
Dont tell them. Or they'll reupload the same episode next week with the fix :p
+GeneralPotatoSalad That's exactly what I said. Size does NOT correlate with luminocity so that is why there is a bigger dip when the smaller star is in the back meaning that the smaller one is indeed the brighter one
+Nillie Note that the smaller star is also the brighter one.
This stuff blows my mind...its great!
Wooooo a new episode ^~^ love it
such a fantastic channel sir. tyvm
This shirt is one of the most beautiful I've ever seen! Apart from that...you're a wonderful teacher!
congratz on the show. its awesome (:
love these videos