The Sky in 350 Billion Years
Рет қаралды 821,184
Күн бұрынHow did Hubble discover the expansion of the universe?
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Creator/Host: Dianna Cowern
Editor: Levi Butner
Expanding Universe Animation: Keegan Larwin
Special thank you to our X-Ray tier patrons: Carlos Patricio, David Cichowski, Eddie Sabbah, Fabrice Eap, Gil Chesterton, Isabel Herstek, Margaux Lopez, Matt Kaminski, Michael Schneider, Patrick Olson, Vikram Bhat, Vincent Argiro, wc993219
Music provided by APM
www.apmmusic.com/
Stock footage provided by pixabay.com
Stock footage provided by shutterstock.com
If you liked this video check out these:
A picture of the beginning of the universe
→ www.youtube.com/watch?v=rut6f...
Why is the Universe Flat? ft. Prof Alan Guth
→ www.youtube.com/watch?v=MTUsO...
physicsgirl.org/
Twitter/Insta/Facebook/TikTok: @thephysicsgirl
Sources:
history.aip.org/exhibits/cosm...
www.smithsonianmag.com/histor...
books.google.com/books?id=vE9...
www.space.com/34708-henrietta...
www.mtwilson.edu/building-the...
@physicsgirl 2 жыл бұрын
Our sky won't look exactly like this in 350 billion years, because we won't have a sky. The sun will have swallowed Earth 342.5 Billion years prior in a spectacular all-you-can-eat planetary buffet.
@beaumullins38 2 жыл бұрын
Question, if lets say another planet is moving away from us faster than the speed of light, and the speed of light and time are similar, would they seem to be going backwards in time to us if we could observe them somehow?
@lt_johnmcclane 2 жыл бұрын
Yummy
@deodatsingh4621 2 жыл бұрын
I understand Galaxys are getting harder to see, but stars in our own galaxy are disappearing too? That mean our galaxy is getting bigger 🙄
@utubeableact 2 жыл бұрын
Why swallow?? Space is expanding. But the objects embedded in space, like planets, stars, and galaxies stay exactly the same size. Sun is also a star then why would it swallow all planets??
@anandmistry4850 2 жыл бұрын
Does this mean that the cosmic microwave background could just be the remnant of light from galaxies beyond our observable universe and this light has been redshifted so much that we can only observe it in the microwave / radio spectrum instead ?
@YummyPork 2 жыл бұрын
Loved the analogies you used to describe this mind bending stuff. "Stickers on a slinky" and "Humans are like rhinestones on stretchy pants" are going to stick with me as much as "We are made of star stuff"
@xLatinAssazzin 2 жыл бұрын
Spiderman no way home the video game kzfaq.info/get/bejne/b7yqdKheqc_Qj6s.html
@_ninthRing_ 2 жыл бұрын
The "We are made of Starstuff." was one of those amazing statements made by the late, truly great, *Dr Carl Sagan* back in the wonderful *_1980s_*_ Documentary_ *Cosmos.* I highly recommend watching both the *1980s* original (preferrably remastered) & the *2014* remake/sequel with *Neil deGrasse Tyson.* Both have amazing science facts, history & philosophy, and are simply wonderful to watch - especially with curious kids (like I was when the original came out, all those decades ago).
@parksnewbornportraiture4989 2 жыл бұрын
Rhinestones on stretchy pants. I love it!
@guillaume5313 2 жыл бұрын
@@xLatinAssazzin yes
@JROD082384 2 жыл бұрын
But her video is wrong and misleading.
@herblison3374 2 жыл бұрын
Physics Girl is a wonderful inspiration to young people everywhere to study science. As an MIT alum I interview high school students applying to MIT. Many of them mention Physics Girl as a favorite way to learn about cutting edge science. People like Diana are essential for the health of our world.
@davidvernon3119 Жыл бұрын
“Humans are like rhinestones on stretchy pants” absolutely the girliest explanation of the expanding universe I have ever heard! (and I love it)
@sorroplayz 2 жыл бұрын
Thank you for this episode physics girl, growing up I loved everything about cosmology, but life took over and my passion fadded, over a year ago I came across your channel and you ignited my interest, thank you so much, The mental wellness that you spread to others is so important and understood by more than you can believe, we understand and thank you for helping everyone learn that bit more about life.
@Willbolt_ 2 жыл бұрын
:)
@ericparrish1515 Жыл бұрын
I'm offwhite
@liamclarke64 2 жыл бұрын
My mind really starts to "blow up" when I consider the fact that we can't be at the center of the entire Universe - so what "shape" is it, and where are we in it? I understand that we must be at the center of the "observable" universe because we are the observers, so that is not what I am saying. I love this channel; it makes me try to think about the unthinkable :-)
@k1ng401 2 жыл бұрын
Haha I had just started asking “why are we in the centre of the observable universe? Bit of a coincidence…” and then I realised “duh” 😂
@suncat530 2 жыл бұрын
@@k1ng401 it's like asking "why are my eyes behind my field of vision" lol
@liamclarke64 2 жыл бұрын
@@k1ng401 That is exactly why I love these videos, because it made you think about that, and now you understand. I love it when my brain does that - a light bulb moment!!!
@_mortiam 2 жыл бұрын
For the universe to have a center or a shape at all, it would have to have a boundary. Which it doesn't as of current knowledge.
@gabor6259 2 жыл бұрын
@@_mortiam It doesn't have to have a center or a boundary if it's the 3D surface of a 4D sphere.
@kosys5338 2 жыл бұрын
Diana is the perfect educator, she makes learning about the universe and the physics that rule it interesting and fun. It is always a pleasure to learn what she has to teach even though her teachings most often raise even more questions. Keep up the great work Physics girl.
@thetruffleist1297 2 жыл бұрын
Her and Scott man
@godsbeautifulflatearth 2 жыл бұрын
The Earth is Flat.
@noobkingd706 2 жыл бұрын
This video explains why i rarely see stars in my place, i only see 1-13 stars also + the sun lol
@d.castillo9495 2 жыл бұрын
I'm still in awe of when I heard that the fastest human made object in space would take thousands of years just to reach the next star system in our own galaxy. When you talk about billions of years at the speed of light, forget about it.
@vb2388 2 жыл бұрын
JWST itself is taking a month’s time to reach around 1 million km.. The nearest star apart from Sun is 36 quadrillion km away from us.. So yes, definitely will take time…if my calculations are right…it would take JWST 90 million years to reach Proxima Centauri
@godsbeautifulflatearth 2 жыл бұрын
Who told you that..?
@VORASTRA 2 жыл бұрын
@@vb2388 your calculations ignore the fact that JWST sent the way it always slows down to the point where in L2 it has about 0 m/s speed
@vb2388 2 жыл бұрын
@@VORASTRA I took it as an average..rather what speeds JWST was travelling in every single point.. JWST definitely starts fast and slows down in the end as it reaches its destination..
@Yora21 2 жыл бұрын
The speed of light seems incredible fast here on Earth. But on galactic scales, it's incredibly slow.
@nowammies9986 2 жыл бұрын
I remember going to the Lick observatory in Mount Hamilton just outside of San Jose, with my university. I got to look through the main telescope and see a star that was light years away with my own eyes. It was such an eye opening experience, and I am so glad that places like this exist and that you get to share them here with us on the internet!!
@colorgray3251 2 жыл бұрын
You're so lucky!
@colorgray3251 2 жыл бұрын
Also thanks Dianna, you're awesome
@Graeme_Lastname 2 жыл бұрын
They're all light years away. ;)
@dannyarcher6370 2 жыл бұрын
Ummm. All stars are light years away...
@Graeme_Lastname 2 жыл бұрын
@@dannyarcher6370 You noticed?
@spoorky7718 2 жыл бұрын
Please keep doing space stuff! These are incredibly fascinating and entertaining!
@DNTMEE 2 жыл бұрын
To me, one of the most mind-bending things about light is that, as it travels through space, time does not exist for it. If it was somehow "aware" a photon of light would think it left the source which created it only an instant ago. Even if it has been traveling for billions of years. The instant it hit something and stopped, it would think it just left the source a moment ago. It would be very confused since it saw nothing in it's way just before it started on it's journey. From it's perspective something jumped out in front of it just as it left. I believe that is also the reason it can keep going and going. If no time passes for it, no energy is given up. Also, no matter how long it travels it will never get lonely.
@TD_JR 2 жыл бұрын
First time visiting your channel - and I appreciate the effort spent in giving props to some relatively unknown names in the history of cosmology. I have a bit of an interest in history itself and often times, those who've contributed even the smallest achievements in history are overlooked by those who've expanded on their discoveries to finalize achievements we attribute to those who've crossed their t's and dotted their i's with the work of those that have come before them. Here's to you Henrietta Leavitt... you did good.
@ericparrish1515 Жыл бұрын
That you Aurtouro?
@-First-Last Жыл бұрын
@ T D Did you read the title ?
@TD_JR Жыл бұрын
@@-First-Last Did you watch the video? I was commenting on some of the names mentioned in this video that people haven't heard of before and yet, have contributed much to astronomy and cosmology over the years.
@Thebreakdownshow1 2 жыл бұрын
Physics girl would be an excellent show title for kids. Superman, Wonder Woman and physics girls. It’s time we make science more friendly for kids. Keep up the great work you are an inspiration for me as a creator.
@KCadbyRacing 2 жыл бұрын
Agreed!!! 👍 Kids need to be shown there are other things to 'life' other than video games and social media...
@Thebreakdownshow1 2 жыл бұрын
@@KCadbyRacing growing up I had so much cool stuff I watched that got me intrigued towards science and critical thinking. I see that missing from the big organizations.
@Thebreakdownshow1 2 жыл бұрын
@@glauconeto what was your favourite show growing up?
@KCadbyRacing 2 жыл бұрын
@@Thebreakdownshow1 Kids interests (or lack of) starts in the home with the parents, that plus too much of todays daily input are all digital now. I grew up through the land-line only and b/w to color TV transition days = we were almost always outside doing/learning _real world stuff_ ...
@user-pd9ju5dk5s 2 жыл бұрын
But then Superman and Wonder Woman would be breaking physics while Physics girl wont?
@suzannestrickland1586 2 жыл бұрын
Awesome sponsor! Thank you for helping remove the stigma of talking about mental health. It is definitely an important topic. I got to see the pre-release version of this video. Wanted to say that the additional visuals and examples were excellent. The things we learn about the universe are mind blowing. It has sparked some questions. I will have to write them down so I can send them for the next live stream.
@donsheffler 2 жыл бұрын
This was great. My family and I hiked all the way up Mt Wilson about a dozen years ago - what a climb! - but had no idea that this was such a distinguished famous observatory.
@josephc6588 2 жыл бұрын
I just discovered your KZfaq channel and I’m hooked on your presentation and intelligence. I love science and you make it fun to learn. If possible can you talk about the 40” Refractor at the Yerkes Observatory and the other early telescope’s that made Cosmological or Astrophysics possible. The Hale Reflector I’m sure would be included on this special list.
@saltadmin7829 2 жыл бұрын
I've watched a lot of descriptions on dark energy and the expansion of the Universe, and I can honestly say this presentation gave me the best visual understanding yet
@davidh.4649 2 жыл бұрын
Awesome video Dianna! As I watched this video I found myself thinking, you know, as good as Carl Sagan was, as good as Neil deGrasse Tyson was, I'd love to see Dianna do a season of Cosmos! You'd be great at it! The whole key to Cosmos is being able to explain highly technical things in layman's terms that people can relate to. You've already proven on your channel with lots of great videos that you can do that. And your geeky enthusiasm (I say that with admiration and affection 😁, I'm an engineer so I know what it is to be a geek) makes people want to listen to you. 😊
@mysterymeat586 2 жыл бұрын
Dunno. Her pretty face might be a distraction for us men.
@tokenghost4536 2 жыл бұрын
@@mysterymeat586 There were definitely less odd ways to compliment her, lol.
@mysterymeat586 2 жыл бұрын
@@tokenghost4536 Yea, couldn't help myself.
@whydidyouresign 2 жыл бұрын
Neil still IS, man!!
@DNTMEE 2 жыл бұрын
Unless you bite the heads off of chickens, you're a _Nerd,_ not a Geek. Well, okay, that's what "Geek" originally referred to. Mostly side show performers who did things like being a human chicken guillotine. Over the years it morphed into just another term for a tech freak.
@nate.r 2 жыл бұрын
You seriously make some of the best videos on KZfaq always 10/10 and jam packed with information. Props and thank you for your work
@herculydia 2 жыл бұрын
Your hair looks Amazing. So healthy! Thank you for your opening comments and encouragement. I have felt so different and down and out of sorts with the huge ripple in our society and conflict reaching all our friends and family. Better now and so truly glad to see a new Physics Girl video to watch several times to grasp all the knowledge available. Thank you!!
@__eachfire__3418 2 жыл бұрын
I love your work physics girl. Thank you so much for creating all of your wonderful content.
@trstmeimadctr 2 жыл бұрын
The Mt Wilson session director seems like one of those people that you would be fine listening to explain literally anything
@vigilantcosmicpenguin8721 2 жыл бұрын
He seems like the one person at a family reunion whose stories you'll always want to hear.
@ianndurocher7925 2 жыл бұрын
He sounds like someone who would send you get the dragonstone
@wmellor87 2 жыл бұрын
cool and relaxed in the pursuit of knowledge
@hoppeltrottel7484 2 жыл бұрын
Diablo III plot twist: Deckard Cain feigned his death and changed his name to become the Mt Wilson session director. "Hello my friend, stay a while and listen..."
@johnkemas7344 Жыл бұрын
I wish I had instructors like you in high school and college!! Keep up the great work! Your smile and enthusiasm are infectious!! You are now my co-favorite physicist, the other being Dr. Tamatha Skov, a solar physicist and and an amateur radio operator. You two are both well educated, informed and very intelligent. I am an amateur radio operator and have spent my career as a devoted science person.
@shaileshrana7165 2 жыл бұрын
I love your work, Physics Girl. Thank you so much for doing this.
@christopherbarber9351 2 жыл бұрын
Thank you for your work! I hope you'll continue taking care of yourself -- you and your work are very valuable to us viewers.
@u6106l 2 жыл бұрын
Excellent episode! Thanks for your efforts to bring science to the masses.
@muthukumaranl 2 жыл бұрын
Thank you for this wholesome piece...even though i knew a little bit about the subject i still found it infotaining with those historical context that you so nicely placed it in...
@deepam5246 2 жыл бұрын
This is your coolest video yet. I loved it and learned so much! Keep up the great work
@geoffstrickler 2 жыл бұрын
It finally clicked for me the the expansion of the universe, and grasping that space itself can expand faster than c, also explains the incredible expansion of the universe during “inflation”. It doesn’t necessarily require a different set of physics, although gravity could not have operated the way we understand it today.
@randar1969 2 жыл бұрын
yeah if you take the current speed 73.3 km/sec per Mpc (Mpc=3.3 million lightyears) you can roughly calculate when the space between two object is so fast the lightspeed is slower. Like she said nothing can move trough space faster then light but space can expand with 73.3km/sec each 3.3 million lightyears. The only reason Andromeda is heading towards us is because gravity brings them closer together at an speed that is greater then the expansion speed. But it looks like the expansion is going faster over time.
@alwaysdisputin9930 2 жыл бұрын
@Robert Evans Yes, we are travelling FTL & we are not & there's no contradiction because speed's relative. When going along a motorway, a car travels at eg 100 km/h & it is also stationary. If you throw a ball into the air inside the car, it'll just go up & down like you're stationary. Because you are. In that frame of reference. & in the frame of reference of a far galaxy, we are travelling FTL.
@Sela2125 2 жыл бұрын
I cannot properly describe my excitement whenever I see there's a new Physics Girl video. You have such a passion, not just for teaching, but teaching in a way that makes one happy to learn and wonder. You are, in my humble opinion, the Bill Nye for a new generation!
@tastyneck 2 жыл бұрын
I really enjoy these types of interviews. Thank so much!
@zrodger2296 2 жыл бұрын
Really good video. I can tell when I have to rewind here and there to hear something explained again, and especially when I find myself leaning towards my screen. As if being a few inches closer will help me understand better! Happy Holidays to all! (And best wishes for JWST!)
@DrewBritten 2 жыл бұрын
Mind blown! This episode was so fascinating and so mind bending at the same time. Thanks for seeking out the brilliant women scientists of the world who have succeeded despite all the obstructions in their path. I just ordered a copy of Dr Mack's book, and can't wait for it to arrive! Also, thank you for taking time to step away from KZfaq for your own health. Your content is always worth the wait, even the less polished early videos.
@jazznik2 2 жыл бұрын
I went to the Mt Wilson telescope years ago (took somewhat longer than an hour from LA). It's worthwhile for anyone interested in astronomy or cosmology. I also observed the "inversion effect" where you can see the smog of LA trapped at below around 4000 feet. The air above still remains very clear.
@BenC20B 2 жыл бұрын
You didn’t take a horse and cart did you?
@alwaysdisputin9930 2 жыл бұрын
@@BenC20B er that might've been me. What can I say? I felt like a bit of joyriding.
@vigilantcosmicpenguin8721 2 жыл бұрын
@@BenC20B They said "years ago," didn't specify how many. I assume they meant it happened in 1900.
@wmellor87 2 жыл бұрын
I felt for those poor people living their short lives under that layer of pollution
@pauls5745 2 жыл бұрын
great stuff! I always learn something when I watch this channel. Maybe we could get something focusing on conservation of energy? fascinating stuff
@hatchetman3662 2 жыл бұрын
Just found your channel, today. Really glad I did. Your content is great at entertaining and informing. Subbed.
@GlennRiccobono 2 жыл бұрын
"A Roomba exploded" sounds like a future video, Dianna... 😎👍 Happy holidays!
@mikeoxmall69420 Жыл бұрын
Tsar Roomba lol
@ericvanvlandren8987 2 жыл бұрын
Dianna, I love your videos so much. I’m glad you take breaks for yourself. I’m sure you know (but it is always important to hear) that you have thousands and thousands of people who support you and care about you - thanks to your channel. You’re the best. Happy Solstice.
@troyrodrigue6172 2 жыл бұрын
One's again. Awesome! You have such a way to explain everything. I must say I have read this book from Katie Mack, Outstanding book. Thank you so much. Merry Christmas to you and yours and may the new year bring us just a little bit closer to understanding everything.
@mercenairy1 2 жыл бұрын
I LOVE YOU PHYSICS GIRL...YOU MAKE PHYSICS FUN!!! NEVER A DULL MOMENT... IM A HUGE FAN (200 POUNDS..LOL) THANK YOU FOR SHARING ALL THE AMAZING THINGS...AND HAPPY NEW YEAR
@thylacinenv 2 жыл бұрын
Is the edge of the universe smooth or does it resemble the outer edge of a sea urchin where dense galaxies with a greater concentration of energy drive and contributes to the expansion of space itself? Is this possible without dark energy? I really wish Henrietta could have known just how much we admire her stunning contribution these days, she was an astonishing woman.
@RobbieRosati 2 жыл бұрын
The edge of the observable universe is very smooth actually. We've measured the lumps of the earliest things we can see, and they're only around 0.001% of the average value. On big scales, the universe is not very lumpy at all, there are about the same amount of matter per volume everywhere. And the further you go back in time, the less lumpy it is.
@GlenBradley 2 жыл бұрын
We have no idea what the actual "edge of the universe" looks like nor do we even have any real data from which to speculate on. The edge of the OBSERVABLE universe is incredibly smooth, because it's all but the inside of the Big Bang, ie the cosmic microwave background radiation from the hot plasma soup that came immediately after the Big Bang. Once your observations get out to around 14 billion light years away, you are looking 14 billion years into the past, and therefore the Big Bang. We cannot see anything past 14 billion light years away because past that there is no universe to look at, nevertheless the ACTUAL universe may be 60 billion light years ... or 600 billion light years across. We are limited in our observations by the speed of light.
@maartenvd2653 2 жыл бұрын
I think there is no edge in a real sense: the earth is on the edge as seen from the edge as determined from the earth viewpoint.
@thylacinenv 2 жыл бұрын
@@maartenvd2653 Thankyou for putting my brain cells into panic mode, it's a mind boggling concept..
@bigsarge2085 2 жыл бұрын
Fascinating! Makes me wonder what new discoveries will alter our current understanding of the state of our universe.
@jorengoeteyn4797 2 жыл бұрын
I always wish these vids are longer =) Love to watch them, there so great. It set people to think, even if we don't have a physics background. My question is: Will everything fade out with the scenario if only the universe keeps expanding? So is the universe determined what ever it does to cool down eventually?
@ericparrish1515 Жыл бұрын
Somewhat but I can't really see any science stuff in reality. Just punks.
@RideAlongAdventures Жыл бұрын
I’ve watched this dozens of times. I keep hoping my brain will grasp even the smallest part of this. Until then, I’m left with this incredible, exciting awe. Thanks for sharing this in such an inspiring way. Also, hope your feeling better. I/we miss you!
@Roberto-REME 2 жыл бұрын
Outstanding video: very informative, lots of learning, fun, interesting and excellent narration. You're the Best Dianna.
@Tralin 2 жыл бұрын
Always love these videos! Caught one thing though: "I hope that sometime down the road our ancestors are blown away by what we don't know yet." I think you mean "descendants" :P
@alwaysdisputin9930 2 жыл бұрын
the spawn of our loins' spawn of their loins' spawn of their loins yeah 'descendants' is better
@Tralin 2 жыл бұрын
@@alwaysdisputin9930 Actually. I changed my mind. I'm with you.
@DrRiq 2 жыл бұрын
@@Tralin what? he agreed with you already. you didn't need to change your mind
@Tralin 2 жыл бұрын
@@DrRiq I was making a joke, bud.
@DrRiq 2 жыл бұрын
@@Tralin ...
@yetanothertop Жыл бұрын
Amazing! Thank you! You make it fun and interesting. And, then, you slip in the information in a way that makes me want to watch your next video. I would love to see you do a Great Courses series.
@requiemglassworks9254 2 жыл бұрын
I love how excited you get about the sombrero galaxy at 2:00, that put a smile on my face! Exploding rumba galaxy sounds better!
@MorganHJackson 2 жыл бұрын
Awesome video, this explained a complex concept really well. I'm also really glad to hear you take time off for yourself. Your own health is the most important thing, it's so good to hear you can take time to look after that.
@montanateri6889 2 жыл бұрын
I love your shows. And I love the clear joy that shines from you in imparting knowledge. In discovery. In science. You rock!
@KonwTheTrut 2 жыл бұрын
Omg I cannot wait to read her book. Always been fascinated with the after after. Thanks for the recommend.
@asherplatts6253 2 жыл бұрын
I'm excited to watch this episode. The thing that keeps blowing my mind is that the distant light we can see is from when the universe was smaller, but it's bigger now, so we are seeing a 3-D image of a smaller universe that is now bigger than it looks. Which I can't quite wrap my head around without employing the weird curves of a 4-D sphere that "turns" backward on a time axis as you increase distance from a center point.
@brentu777 2 жыл бұрын
Such an amazing video!! It’s hard to wrap your head around a lot these concepts or even try to contemplate them, your style makes it understandable and much less daunting for non physicists and astronomers. Thank you so much!!!!
@FeierLin 2 жыл бұрын
Hi Diana! Great video. I have a question that I'm not sure if you already have a video on... But what exactly is space? Does it lack atoms entirely? Or like, a measurement of the distance between two objects?
@Mental_Illboy 2 жыл бұрын
I'm scared of intelligent pretty girls.
@ikitclaw7146 2 жыл бұрын
No one knows for sure exactly what the "fabric of space" is, a boundless 3 dimensional expanding area containing all that is? Lots of interesting theories though.
@FeierLin 2 жыл бұрын
@@ikitclaw7146 it's crazy trying to wrap my head around 🤣🤣
@KentonBenfield 2 жыл бұрын
If you read up on the Wolfram Physics Project, the going hypothesis is that space is possibly the only 'thing' in reality, and everything else (even time) is just built out of this universal 'stuff'. And it's also a type of universal computer; and it's discrete, not continuous.
@demonicmaleficentviciously140 2 жыл бұрын
So cool! Ive hiked chantry flats so many times, I didnt know the Hubble was up there!
@ronniescrazyadventures2478 2 жыл бұрын
Thanks for flipping my understanding of the universe on my head Diana! I love this work.
@Let_The_James_Begin 2 жыл бұрын
I'd love to learn how time dilation figures into universe expansion and the cosmological horizon. It might turn my brain into oobleck but I still want to know.
@Nighthawkinlight 2 жыл бұрын
Not enough science is done with pipe smoke these days.
@alwaysdisputin9930 2 жыл бұрын
David Tong says: "There are many places in the universe where solitons form, smoke rings in air..." kzfaq.info/get/bejne/e8qVpcmlnsrPkZs.html
@rayoflight62 2 жыл бұрын
Very, very well explained. I read Weinberg book "The first three minutes" when I was a student; at the time, it took me an entire week to grasp all the concepts which you and Dr. Mack explained clearly in few minutes. Thank you...
@noisecrack 2 жыл бұрын
I love your channel. i love this kind of content and detail. good editing.
@hasanelrabih283 2 жыл бұрын
Yes! Praise the Sombrero Galaxy! It's one of my favourite celestial bodies!
@vigilantcosmicpenguin8721 2 жыл бұрын
I'm holding out for when someone discovers the Beret Galaxy. Or the Stovepipe Hat galaxy.
@mikeoxmall69420 Жыл бұрын
@@vigilantcosmicpenguin8721 tophat galaxy, helmet galaxy
@NewMessage 2 жыл бұрын
My waistline totally feels for ya, Universe.
@trepplee 2 жыл бұрын
I could sit and listen to you for days n not get tired!!!! Love ur vids! Amazing stuff!
@cornebistouille 2 жыл бұрын
THANK YOU ! i am quite familiar with concepts of expanding universe, and dark energy, but this is the first time i really understand them, and yes it is mind blowing ! a little scary too, but amazing :)
@johnchessant3012 2 жыл бұрын
A very strange mathematical fact: If the universe expanded at a constant rate, then it would actually be possible for light currently emitted by a distant star to reach us, though it would take a long time. (basically, the fraction of the total distance the light travels per second decreases over time, but slowly enough that the sum still diverges -- see the Wiki page on the "ant on the rubber rope" puzzle.) But this is not true if the expansion is accelerating!
@YoutubeHandlesSuckBalls 2 жыл бұрын
No. There would still be a point beyond which we were unable to see objects. Because each light year stretches the same amount, something 2 light years is moving away twice as fast because you add up each segment, which means objects further away recede faster. However slow the expansion, even if constant, there would be a point moving away faster than the speed of light and so no light from objects further than that would ever be able to reach us. The acceleration of the expansion merely exacerbates this and will lead to the 'event horizon' becoming closer over time.
@super_hero2 2 жыл бұрын
@@KZfaqHandlesSuckBalls I think you misunderstand what John said, when he says "the universe expanded at a constant rate" he meant that every year, the distance between 2 objects in space increase by the same amount. So year 1 add 1 light year, year 2 add 1 more light year, year 3 add another 1 light year and so on. Which is different from what you meant by "each light year stretches the same amount..." which is not constant amount every year because the added space also adds more space. In John scenario, light will eventually reach us, in your scenario it might not reach us.
@agargamer6759 2 жыл бұрын
I watched the video already familiar with the cosmology side of things, and I was struck by the human experience that you captured here. What were these people like? What was going through their heads as they made discoveries that we still talk about?
@chrisandlane 2 жыл бұрын
I was wathing the lift-off of the Webb telescope live and couldnt help but think of you. Happy holidays and happy new year!
@thomasjohnpaine8443 2 жыл бұрын
Great video. Thanks for mentioning your self care, it makes me feel less alone. Especially in a world gone insane.
@bdgrandin 2 жыл бұрын
This is a all very interesting. Weird question. Has the expansion effect where a far enough galaxy's light will no longer reach us been observed? Have we observed a galaxy’ disappearing from our view due to the expansion between us and it becoming faster than light can travel from it to us? Are there recorded examples of this occurring. I would think if the theory is true we should be able to see it. That discovery and proof would be great to share and show people.
@garykoponen7244 2 жыл бұрын
They mentioned that galaxies on the edge of the observable universe would fade out. It seems to me that when a point in spacetime coincided with expansion that they would blink out.
@Demonrifts 2 жыл бұрын
We've only really been able to look at the edge of the observable universe for a few decades now. On a cosmological timescale, that is less than an eyeblink. Factor in that there are billions of galaxies, the likelihood that we would notice one of them suddenly fade out is abysmally low. I wouldn't expect that that will ever be something we witness.
@CrazyTechy 2 жыл бұрын
Great astronomy stuff, and you’re fun to watch. The number of galaxies and the expanding universe is mind blowing. I’m an elect engineer with a computer background.
@marancibia1971 2 жыл бұрын
Dianna, I love your videos. Your passion for physics is contagious. Greetings from Chile.
@jeff6899 2 жыл бұрын
Love everyone of these ! Very en"light"ening ! 😁 Continue to take care of yourself. Your enthusiasm & honesty is refreshing & infectious :)
@hexisplus9104 2 жыл бұрын
My brain started trying to think about the calculus needed to work out that an object moving away from us due to the universes expansion. Combined with the concept we are rotation and spinning within the milky-way, solar systems and on the earth makes the maths kinda insane... Unless they are using tons of approximations. 🤔
@ikitclaw7146 2 жыл бұрын
your just over thinking it, while its not overly complicated it still requires a good education in maths. and you can never discount approximations when it comes to scientists lol, approximate, check, rework, narrow down the result, try again.
@YagamiKou 2 жыл бұрын
if we lack alot of data, scientists can use fermi problems they are a kind of math where u get estimates for all ur variables and the answer is weirdly accurate because errors in 1 assumption, get cancelled out by errors in other assumptions leading to generally accurate answers they arnt heavily relied on but they can give good indications and sometimes hints of what u really need to look at or in my case, I use fermi problems to estimate the cost of my shopping 🤣
@hexisplus9104 2 жыл бұрын
@@ikitclaw7146 I did theoretic chemistry and chemical physics. I was a maths and science teacher in a previous life. My maths is pretty good.
@hexisplus9104 2 жыл бұрын
@@YagamiKou you are spot on, we used these alot in our theoretical chemistry and chemical physics classes.
@marcuswelseh9000 2 жыл бұрын
Despite the economic crisis,this is still a good time to invest in stock and Crypto trade🥰
@martins2375 2 жыл бұрын
The rich spend less and invest more..
@gratisgratis7275 2 жыл бұрын
Investing in these economic crisis will be one of the best thing to do..
@ryanscribner9285 2 жыл бұрын
@@gratisgratis7275 You're right! I think stock and Crypto are the best😊
@dimitratzina6919 2 жыл бұрын
As stock's are good but crypto is better?
@davisonmichigan4039 2 жыл бұрын
I wanted to trade crypto but got confused by the fluctuation in price..
@nickaston2468 2 жыл бұрын
Excellent video, presentation and explanation. Thank you.
@nutier 2 жыл бұрын
Awesome video ! I enjoy it so much . Thank you for sharing . How many habitable planets in the universe ?
@Yashuop 2 жыл бұрын
Claim your “here within an hour” ticket right here
@facts9144 2 жыл бұрын
Looool ur channels dead🤣🤣🤣
@jjgarridopro 2 жыл бұрын
Great content!. I just discovered your channel and learned more about the universe expanding. :)
@Robert_Keel 2 жыл бұрын
Absolutely great presentation - thanks.
@sargenmi 2 жыл бұрын
What a great video, thanks and Merry Xmas 🎅🎄💝
@darylpeterson9115 2 жыл бұрын
This is way above my education level but I love it. Thats for sharing your knowledge. I'm hooked
@quantonica5348 2 жыл бұрын
I don't always sit through the sponsor part but I did in this case , it's comforting to know you are taking care of your mental health and well being. I can wait a while for a new video with the knowledge you are coming back with your happiness and enthusiasm fully charged with excitment for all things Physics.
@jayshaw1108 2 жыл бұрын
I started watching your videos very recently. I am so fascinated by your enthusiasm and effective communication to explain complex science. Could you please try to come up with videos to explain Einstein's Special/General theory of relativity for common man + a video explaining all the fascinating discoveries/timeline in astronomy upto the latest . Thank you and wish you the best.
@Soulfire252 2 жыл бұрын
Great presentation on a very mind bending subject. Bravo you just got a new fan🤩😎
@v3nt1main 2 жыл бұрын
My dad once told me (when I was around 8 or 9) that it's the lights here on earth that is causing the thing of why we can't see the stars but after I watched this, I was kind of scared but like I watched 3 of your videos and I liked it and i really love your channel! It helps me learn about these kind of stuff that I never learned in my life!
@hughbarton5743 2 жыл бұрын
And thanks as well, Dr. Mack! Very lucid explanation...nice job!
@LittleBigChina 2 жыл бұрын
Great vid conveying some really mind-bending stuff in an understandable way... Love it!
@calvinmarshall54 2 жыл бұрын
You’re awesome I love the information you share.!!! Keep it coming dear.!!! 😊
@michaelschmitt2427 2 жыл бұрын
Really great job on a difficult and confusing topic. Bravo!
@reggiebald2830 2 жыл бұрын
I was fortunate to grow up with the San Gabriel mountains as my backyard (Pasadena)! Mt. Wilson Observatory @ 14!
@davesatxify 2 жыл бұрын
You and your videos rock. making dry history and science dynamic and interesting. thank you
@dimahamza8568 2 жыл бұрын
Keep going Dianna I love hr vids!
@Mike504 2 жыл бұрын
Merry Christmas (or your equivalent) and love to Dianna and all.
@kakarikiIck 2 жыл бұрын
Happy Christmas Dianna
@xXPlumpkinXx 2 жыл бұрын
Love the videos. This is the stuff keeping me sane these days. Thank you.
@HondaATC330R 2 жыл бұрын
I just found your channel. I love your enthusiasm. It is a lot like mine. 😀 Thanks for all the interesting content!
@davidgpeterson 2 жыл бұрын
You do such an amazing job with these videos.
@ericparrish1515 Жыл бұрын
Yeah she does.
@maxwell7725 2 жыл бұрын
Great show both content and technally.
@JjVa20 2 жыл бұрын
I love how she says "Goosebumps!" with the biggest smile on her face 😊
@MonesMuziekFabriek 2 жыл бұрын
I LOVE how Dianna gives credit to women who should have been rewarded in the past
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