How Far Away Is It - 05 - Nearby Stars (4K)
Text - howfarawayisit.com/wp-content/...
Index - howfarawayisit.com/wp-content/...
In this segment of our video book, we take a look at our stellar neighborhood and how we know how far away these nearby stars are.
We cover the first stellar parallax measurement form the star Cygni 61. This includes the definition of ‘parsec’ and ‘light year’. We then cover the Alpha Centauri system (Proxima Centauri, Alpha Centauri A & B), and use it to show how we calculate the mass of binary star systems. Then we examine our stellar neighborhood including: Barnard’s Star with its Proper Motion, Wolf 359, Lalande 21185, Sirius A & B, 61 Cygni, Altair, Fomalhaut with its planet, and Vega.
A deeper look into what we mean by ‘luminosity’ is outlined. We point out that it is measured in watts just like a light bulb and that its value over distance from a point source follows the ‘inverse square law’. We use our Sun as an example and introduce Einstein’s famous “energy = mass time the speed of light squared” formula.
We then cover some more stars including: Pollux, Arcturus, Capella, and Castor. Having reached the limits of ground based telescopes to measure parallax, we discuss the European Space Agency’s (ESA) Hipparcos satellite and the more distant stars it helped fined parallax for including: HD 189733, Aldebaran, Mizar, Spica, Mira, Polaris, and Antares. Along the way, we build the mass vs. luminosity empirical graph.
We then cover the new ESA satellite Gaia that is mapping over a billion stars in the Milky Way and nearby galaxies. We follow that with a look at a few stars too far for Hipparcos but well within the range of Gaia: Betelgeuse, CH Cyg, and Rigel.
We end by pointing out that parallax only takes us to a small percentage of stars in the Milky Way and that we’ll need to know more about light to go any further.
Music
@0:31: Tchaikovsky - Symphony No 6, Pathétique IV Finale. Prague Festival Orchestra; from “Must-Have Adagio Masterpieces”
@10:40: Suppe - Poet and Peasant Overture: Hungarian State Opera Orchestra & Janos Sandor, Janos Sandor, Hungarian State Opera Orchestra; from the album Franz von Suppé: Poet & Peasant
@17:51: Puccini - Manon Lescaut - Donna non vidi mai - I have never seen a woman like this; Sofia Philharmonic Orchestra; from album “100 Must-Have Opera Karaoke”
@20:38: Schubert - The Trout from album “A Calendar of Classics - A 12 CD Set Of Romantic Classics For Every Month Of The Year”
Пікірлер: 569
In huge contrast to Alex Filipinko, Neil Degrasse-Tyson, et al, David Butler does not insult my intelligence. These are some of the most interesting, unpatronizing astronomy videos I've seen. The narration is excellent, and I enjoy watching them very much.
@Dayepipes
5 жыл бұрын
You're colliding against a fundamental problem of society, which is that intelligent and educated people have so much trouble comprehending lower intelligence and less educated people. And vice versa. He's not insulting your intelligence, which is very likely well above median, but
@Dayepipes
5 жыл бұрын
OOPS! Well since I'm committed by accidentally posting before I was sure I really wanted to say anything, I'll carry on by saying he only got about 9 sentences along before mentioning, without explaining, "parallax measurement." At that point he left most of the American population behind. The other presenters you reference are pitching to mainstreet and middle/gradeschool viewers who aren't up to your level. Nothing in media is aimed at "people" or society; everything is designed for slices of demographics that can be easily sold to sponsors.
@swinde
5 жыл бұрын
Bryan Krussow ... The main difference here is that David Butler's videos are more aimed at people that have some background in science and astronomy, and Neil DeGrass Tyson is a popularizer of science toward an average demographic. Neil has to seek metaphors that the general public has a chance of understanding. Some cause misunderstandings like "pear shaped" and "oblate spheroid". While true, the deviation from a true sphere is so slight that it cannot be seen in a picture of the Earth from space. Many lay people do not and will not understand this. Carl Sagan was the best science popularizer. I do not think anyone will ever match Carl.
@bartwilson2513
5 жыл бұрын
It’s all about the audience. If you find more general lay science an insult to your intelligence, I suggest you use your intelligence and only seek out information at more of an advanced science level. This has everything to do with you, and nothing to do with other experts who are speaking to different audiences.
@pleasuretokill
5 жыл бұрын
He's super smart, don't ya know? Not like the rest of us dummies. This guy knows big words like parallax. No one else knows these words or their meanings.
I go to sleep listening to your videos. I learn a few things new things about our Universe and your voice puts me to sleep
I watch and listen to David Butler s videos to fall asleep at night 🙂
@rakeshmohanty7243
4 жыл бұрын
best thing no ad
@glenisthomas7423
4 жыл бұрын
Cuz it boring lol
@DayKurniawan
4 жыл бұрын
Me too
@crosisofborg5524
3 жыл бұрын
glenis thomas maybe you’d find Tiktok more your speed. David Butler videos aren’t boring to people who enjoy learning.
@jeffsullivan2044
3 жыл бұрын
I just wanna be light years away when I hear it.
pretty amazing when you consider how long stars live and how fleeting our lives are
@drfoodstamps1604
4 жыл бұрын
Its depressing
@PraveenSriram
Жыл бұрын
It is really scary and depressing to put it mildly. I wish I could live as long as the sun ☀️ or 1 billion plus years
@Gfysimpletons
Жыл бұрын
Quadrillion upon quadrillion upon quadrillion of years will pass after we are dead! Makes me sick to think how fleeting *I* am! 😔
@joseph1845
8 ай бұрын
@@drfoodstamps1604 We are eternal, don't worry, this body and life is just an experience.
@aliaschannel8877
21 күн бұрын
Yes 😮 life is so short, but live forever by Jesus Christ
We are blessed to get this knowledge with you being such a calm and collected teacher. Thank you!
@murlidharkhatkale5208
4 жыл бұрын
I agree fully such a calm, collected and soothing voice enchanted many curious students wish we had teachers like him
@CharlieTourniquet
3 жыл бұрын
I dont understand most of it...but I love to listen and try to. Thank you for keeping my love of the cosmos lit like the flames of Prometheus.
@adawg3032
3 жыл бұрын
He’s like the grandpa we all wish we had growing up
@michaelroahan3930
3 жыл бұрын
Cمحمد. harlie Tourniqنuet نغحج
@bobtom3625
3 жыл бұрын
Ummm... So are most of your teachers manic/irrate? .. I like David too, but I don't think it's out of the ordinary for a teacher to be "calm and collected"...
It’s incredible to just know how much you can learn on KZread with a pair of eyes some ears and a brain you sir have taught me a lot
@corydinsmore1117
Жыл бұрын
What else are you going to learn with? What a goofy comment.
There's only 2 things I find wrong with David Butler videos. Not enough of them, and rarely long enough! Was excited to see this new video :)
@GoDodgers1
5 жыл бұрын
1. I fall asleep during them. 2. I crack my head when it hits my desk
@N34RT
5 жыл бұрын
I think the term "parsec" is referenced in "Star Wars" movies, NOT "Star Trek" ("... the ship that made the Kessle Run in 12 parsecs ...")
@user-bx7nw1ve6y
4 жыл бұрын
@@N34RT Parsecs are, indeed, mentioned quite often in Star Trek genre. Obviously you have better things to do than watching old videos. Kudos.
@ynoten
3 жыл бұрын
@@user-bx7nw1ve6y Han Solo also talks about doing the Kessel Run in under twelve parsec. Despite parsec being a matter of distance, cause Han Solo didnt always know what he was talking about.
I was roaming around youtube in many physics channel that I can find. Until I find your channel. So your channel became my only physics channel to watch and study by then. Informative, genuine, full of real physics not bullshit like some others do. Thank you Mr Butler.
@whipstitchwebwork1383
3 жыл бұрын
Physics is mostly bullshit based upon and built off other bullshit. It's why when we need real 'numerics' in quantom computing we fall into trouble...it's truly baffling how little we actually understand and how far off most science is...especially theoretical physics. Droves of college kids are learning bs to later build upon bullshit, teach bullshit to others, that literally will need to bend over backwards, create new maths, and put round pegs into square holes just to make sense of shit we can't sense.
@FelIpe-gy8oo
3 жыл бұрын
I think so many billions of years are false,since as humans that we are, a million years, yes 1 million is an eternity,so dinosaurs were here on earth about 4 to 7 million years ago
@frogstamper
2 жыл бұрын
@@FelIpe-gy8oo Funny how the only people in your corner are creationists and science deniers, what makes you think you know better than the worlds finest minds on the subject? One way to prove you're wrong are stars that are billions of light-years away, the light you're seeing from a star a billion light-years away is like looking a billion years into the past...when you try to make science fit your religion all you're doing is perverting the science, and ultimately embarrassing and deluding yourself.
@Hecarim420
2 жыл бұрын
If u want physic with no bullshit and u were good on math on high school this channell is perfect to understand better: kzread.infovideos
Excellent background classic music is perfect for the subject matter, as well as Mr. Butler's manner and style of teaching.
I really appreciate this work you do. I watch the videos multiple times because there is just so much to learn. Thank you thank you thank you!
@a121509
5 жыл бұрын
@Arizona person "biblical fact" is an oxymoron.
@mannys9130
4 жыл бұрын
@Arizona person I'm embarrassed that you're from AZ too. I promise guys, there are more intellectuals here than Bible thumping knuckle draggers.
@DonnaChamberson
4 жыл бұрын
MsMsmak I learned that some stars have periods.
@PAULLONDEN
4 жыл бұрын
*@MsMsmak* So true.....there's so much to take in , while entertaining at the same time .
@caseykelso1
3 жыл бұрын
I just found the channel, love it 😀
You've given me a lot to think about, and plenty to learn.
These videos are beautiful. Dave needs preserving like Attenborough.
Professionally presented with such clarity of topic. IF only our College teachers could present topics to thus standard, we would have a greater number of high quality graduates. Thank you Miles
Best documentary film, voice is perfect for the video.
@HeavyMetalRuinedMyLife1971a
2 жыл бұрын
Earth is demonstrably level contained and motionless AND space vacuum cannot possibly exist ! Please grow up 😁
What a fantastic documentary! You dont insult our intelligence by dumbing this down to elementary school level and you dont paralyze us with unconscionable vocabulary. EXCELLENT WORK!
Great videos. I like the raw information presented, narrated calmly, without bombastic music, fast talking, bells and whistles. Reminds me of the superb old informative documentaries. This is how it should be done, thank you David.
@Mrs.NicholsPorVida
8 ай бұрын
I am so glad to have read this comment, though posted years ago, I find it a daily struggle to find informative videos that are not chalk full of audio and visual saccharine.
I’ve never finished one of his videos, this guys voice is better than melatonin.
The Basil history lesson is excellent. The link between parallax and stars creating their own light is a fantastic connection.
Thanks David to share this! its a Jewel for all of us Who LOVE stars since childhood!!
I rewatch these videos often when I'm bout to go to bed. So relaxing music and calm voice and very informative video .
Great upload Sir. Really amazing details and great graphics.
Sometimes I watch this series while doing astrophotography. Usually while in the process of live stacking. Together they give a great sense of wander.
I admire your work, sir!
All you videos are such a gift for generations to come. So well put together and soooo much to learn, and you voice are almost making us getting hypnotized haha. Wonderful! (Excuse my poor grammar, English is not my first language!)
Thank you so much for your efforts to produce this video and information for us all. all I can say is Woww!! My brain is numb right now and need to sleep to recover. Its amazing what humans have been capable about learning of our universe!
4:57 that’s a rounded up version for those of you wondering light travels at 299,792,458 metres/second! for comparison sound travels at 343 meters per second!
This is my favorite chapter of the video book
It's a joy to watch your videos Mr. Butler. So inspirational.
You explain the scope and size of the universe really well!
This was the video that started it all for me. I figured I would get sick of it after watching it 5 times, but here we are.
Content here is so well prepared, organized and presented. I can never get enough of learning this way. Thank You.
"The distance between Uranus and the Sun" - I'm sorry I couldn't help it. Back to seriousness, I love watching David's videos and am surprised that he hasn't more subscribers.
Just incredible explanation Dr. Butler. Great lectures we learn the way you explain all your videos. There is a lot to learn about the infinite universe, and the countless cosmological fenomena. I just wish we find signs of any kind of extraterrestrial life during the rest of my life-time. Hope that the James Webb Telescope carries out this immense task. Sure it will. 👍👍👍
*The type of information you put on your videos is amazing. It's like you skim through and provide us with the most useful and interesting information and data.*
A superb video David. Thank you for your work.
Amazing video. Thank you so very much for sharing this with us. We all truly appreciate it.
Thank you Mr. Butler.
Profoundly glad to have found your channel, Sir! You are incredibly didactic, logical and also a gentleman. I'm impressed. It's like I have no excuses whatsoever now to properly grasp some rather basic concepts I been misusing for so long. Cheers!
You are so important for us... No words! THANK YOU!
Hi Dr. David Butler, your work is amazing. I am not a Physicist by any means, i am a software engineer, and Physics is something that i want to study in the future. I think your videos are some of the best explanations of the many concepts of Physics, ignore all the negative comments, there will always be haters. You should keep doing what you love, and i have watched almost all your videos, and learned a lot. Again, thank you for these video series, they are truly amazing.
Your voice trully relaxing and fullfill my brain with knowledge. I get it for free!!!. Wow
There's an old sailor's saying, if you follow the curve of the Big Dipper's handle you can "Arc to Arcturus, then Speed on to Spica".
I'm glad I found your channel, thank you very much!!!
Thank for your videos. Learning a lot from them.
Fascinating to put across so many facts in a readily understandable manner. Many many thanks
This is the first time I've understood what parallax is... thank you Dave!
Glad to be in your classroom sir. And thanks to youtube.
Thank you! You have a wonderful way of explaining amazing things.
Fantastic information. Enjoyed the tour... specially GAIA updates
I think everyone, and especially flat earthers, should be watching this series. It provides that basic foundation of education that most people either never received, or never paid attention to in school (if they went). This basic understanding of how our models work is something everyone should know and understand.
Your channel is gold! Thank you sir.
Excellent documentary. It is simple enough to understand and learn from.
These are around the best educational videos out there...
Probably my favourite video of the series
Extremely good explanation. Thanks.
thank you David, still very relevant and very enjoyable. it does make my head spin but just amazing
I really enjoy your videos. Thanks
Thanks so much for ur vids.... im so fascinated about the cosmos but always wondered how astronomers know how far a star is to us. Ur docs fully explains how they calc, easy to understand and most of all, it makes sense !!! Cannot wait for further updates... Thx again for ur work!
'Something in the water does not compute' my ability to learn this is now dilute. I lied I didn't understand this really. Kudos to those you who do.
I love your videos David! Something about the scene where you are in your backyard and you actually say “Here I am in my backyard looking at the Big Dipper.” That statement cracks me up! So awesome! Keep up the good work!
Beautiful backyard !
Splendid talk. TY
You got a thumbs up for the mention of the great victory at Wolf 359.
Amazing simply clarification needy deeper things , Great Job
I have just discovered your channel,so glad I did,
you always have such a lovely music in background
Beautiful.
Your videos are amazing. Thank you David
I am a passionate learner of astronomy, this is much better than crash course academy or PBS space time channel
This is the first video I've seen of yours, and that's all I need to see to be a subscriber! I can't wait to see your other videos!
Thank you mr David Butler, you rock all space community. I got first space bike so let's get out there ha.
finally understood clearly what a parsec is. thank you !
@s.ford2290
5 жыл бұрын
Hey.....this guy is better than Star Wars.
@GoDodgers1
5 жыл бұрын
I parsec is how much bullshit you can pile in a square acre. IE, "I crapped a parsec today, while talking about the universe".
@GoDodgers1
5 жыл бұрын
@xc5647321 xc5647321 Excuse me, I meant while THINKING about the universe.
Trout Quintet is particularly nice selection with these stars!
Wow what a Christmas present, I've just found these videos and have been binge watching them, they are awesome. Many many thanks for posting them David, you've made a 55 year old Brit very happy indeed...Happy Xmas to all.
@howfarawayisit
5 жыл бұрын
And a Merry Christmas to you too.
I'm using a link to these videos in comments on other documentaries, showing the correct way to use music in documentaries. I haven't been to a movie in many years, but saw trailers and read that they now purposely have music that drowns out dialog. it's insane!! I did notice I had to struggle to hear the dialog for that trailer, and had thought it was a bad recording or something. Unfortunately, it seems documentary makers seem compelled to follow that horrible path, I guess to show how up to date their techniques are. Correct use of background music is just that. Background music done correctly adds to a documentary. It helps keep your interest on the dialog, not drown it out. Just dialog can put you to sleep. You do need both. And this guy did an absolutely amazing job and I hope he gets the opportunity to work on documentaries for the big producers like Discovery and NOVA or whatever is available now on TV, which I haven't had in years either....had to choose between my internet and a tv and it was a no-brainer. Thank you so much for this wonderful series!! It should be used in schools teaching how to make a useful and enjoyable documentary. By far the best I have seen.
@howfarawayisit
5 жыл бұрын
Thanks.
Great work. Thank you sir
Love your videos!!! They are awesome! I learn a lot!
Thank you so much no adds too thank you i love these videos
Great to see the Gaia update!
Amazing details , knowledgble , thanks ,from INDIA
I've waited for your video! Perfect timing:)
Excellent. Thank you
Thank you for your videos
Great job
Excellent video with a great explanation of methodology and the math used! My only question is, what is the mechanism behind Mira shedding all this material in a vacuum?
I have these on in the background while working, i missed his Star Trek reference until he mentioned the Borg..took me a second to refocus lol
Very informative- I like this video it explains much - but guys like me must watch it over and over to learn - still a great video.
Great Video series! And I adore your music choice
David butler is the fucking man. You my friend are what I watch before I go to sleep. Thank you for this.
Oh, how I wished I had a teacher like you. Wow!,
Thank you teacher I'm learning something from you teacher thank you
I should start by saying thank you , this is very enlightening.
Fantastic video, now I have to see the rest of your videos. Brb with a cup of coffee :-)
Excellent, every time I watch one of these awesome videos It corroborates Psalms 19:1,no other plausible explanation, Thank You - Ken
@georgebranning3349
5 жыл бұрын
You mean fusion?
@thec4fourhundred520
4 жыл бұрын
💩
TIL 1 parsec = 19 trillion miles... And a truckload of other interesting facts. Great video!
Excellent straigtfoward mathematical explanations, it may seem overly simplistic to some of us, as we're past this, but we all need to start somewhere
Well scripted, excellent and humbling
Stellar Odyssey👍
@David Butler - did we miss an opportunity to improve stellar parallax by orders of magnitude using the New Horizons craft (Voyager and Pioneer were too old).
@9:15 Is radio motion and/r Radio velocity has something to do with measurement being done via radio waves?