It really is like a time machine. On earth we are living the present, but when we look at sky we are seeing the past. Mesmerizing.
@rahulsharma2402
5 жыл бұрын
No the starts that we are able to see rn are still alive
@loukaspappas8476
5 жыл бұрын
techincally we never see anything real time. But the distance in our everyday life is so small that the delay is like 0.00000000000001 seconds, basically nothing
@RoYal-xz5ch
4 жыл бұрын
@@rahulsharma2402 If you don't know,Life of stars is 1 billion years
@muzobk5279
4 жыл бұрын
What if i tell you we're living in the present and those stars are currently in the future i.e 80 years, and we receive it's light now.
@pogan4916
4 жыл бұрын
Also, we never experience the present because the time our brain process it it's already gone. If we manage to be faster than light then it will be darkness and we can go back to the past also because our eyes use light to interpret visual things thus we can time travel.Don't lose hope guys. I'm young so I could see this is possible for my future.
@Showerofjyzz
8 жыл бұрын
the universe is constantly sending us information in the form of light. all that remains is for us to decode it. wow.. amazing..
@dre38w
8 жыл бұрын
+Chris Ross lol I love their outro one liners.
@bmlsb
8 жыл бұрын
You do realise if the theory is correct it would actually be impossible to see any star light years away...or even one light day away
@KuracUTeci
8 жыл бұрын
+bmlsb69 what?o.o
@lucaslayton3974
8 жыл бұрын
It sounds more amazing than it is. Seeing the shining of a star from millions of years ago doesn't give us any useful information.
@FlatEarthPhotography
7 жыл бұрын
Lucas Layton yet the stars remain at the same spot all over, every year reset and have been this way a few thousand years since earth was created...
@vishalgaware7598
4 жыл бұрын
I appreciate that you said "Light is the fastest we know" rather than saying "light is the fastest thing in the universe" 🙂
@mromen5158
3 жыл бұрын
The fastest thing in the universe might be dark matter.
@piyushjn92
3 жыл бұрын
@@mromen5158 Thank you for the answer before I asked the question
@pragatibaishya328
3 жыл бұрын
@@mromen5158 may be
@pragatibaishya328
3 жыл бұрын
Yeah
@GeschichtsWissenSchaft
3 жыл бұрын
@@mromen5158 u mean dark energy
@faisalal-tamimi5519
4 жыл бұрын
The more I read about space, the less I know.
@giladkay3761
4 жыл бұрын
Wow so true!
@nemer1228
4 жыл бұрын
تذكر الاية يا فيصل ، قال تعالى (وما أوتِيتمُ من العلم الا قليلا)، الفضاء من كثر ابعادة تخيله يتعب العقل
@vsvijaykumarsaw
4 жыл бұрын
The more u read the more u becomes curious to know about space
@tomloleit1872
4 жыл бұрын
Dunning Kruger Effect
@ohwowitsagiraffe3372
4 жыл бұрын
The more things you realise you don't know, the list of things you don't know you don't know becomes smaller.
@thealmighty1
5 жыл бұрын
Imagine. Civilizations millions of light years away would still be seeing dinosaurs on earth.
@bsvphotography7
5 жыл бұрын
The Almighty oh yes.
@MohamedFakhryim
5 жыл бұрын
Supposing they have a way to observe details on earth surface from such unimaginable distance.
@Fj-jk8fm
5 жыл бұрын
Great one bro! But i don,t think they can that deep. If they can then it will be a very good thing
@jeffgillson
5 жыл бұрын
If they have a telescope that is a few lightyear wide which can see through our atmosphere and focus on animals from that distance... then sure, that would be crazy.
@love4lust7301
5 жыл бұрын
That's why 👽 aliens are coming here on vacation only to be disappointed.
@missjessgem
10 жыл бұрын
"The Universe is constantly sending us information in the form of Light.". I like that.
@onkarmohite7560
9 жыл бұрын
+Jessica Crawford well not exactly. scientists now are looking at space through neutrino telescopes which will give us more information about the history of the universe. thus photons and neutrinos together would decode the information.
@Cybernaut551
6 жыл бұрын
@@onkarmohite7560 What is a neutrino?
@sahinyasar9119
5 жыл бұрын
Although the light is the fastest thing, how are we going to travel between planets while it's taking centuries to reach us?
@ViewlesS13
5 жыл бұрын
@@sahinyasar9119 wanna borrow my millenium falcon
@merciadragon9425
10 жыл бұрын
Great clip but please do not use imperial units eg. miles, in relation to science.
@tomjanbart
10 жыл бұрын
My hero.
@Insertnamesz
10 жыл бұрын
While I agree, I understand why they used imperial. This is Ted-ed, not Ted-scientistsonly My point is, the general citizen of USA will not be able to make sense of metric units, and any person who is scientifically inclined would be able to convert quite easily anyway. In my opinion, they should just report it in both! At least until the US switches to metric ;) Cheers from Canada
@kingkong11ization
10 жыл бұрын
theres nothing scientific about the imperial system.
@InMaTeofDeath
10 жыл бұрын
kingkong11ization It's less efficient but it *does* work, just because you prefer one over the other that doesn't make it unscientific.
@eia1957
10 жыл бұрын
Just because my audience members are idiots doesn't mean that I should forsake the measurement system. Metric is not only the scientific standard, it is the world standard and the US standard (look it up). Besides when a distance of 6 trillion Imperial miles is indistinguishable from the metric 10 trillion kilometers it is best to use the standard not the aberration.
@TrillionaireStudioX3
4 жыл бұрын
My night's sleep is ruined when I think of the univers.
@EmileKleinhans
3 жыл бұрын
Yes it is scary to think you are floating in space, even worse than sleeping on a plane.
@ManOfCinema-
3 жыл бұрын
Ever since i watched interstellar i just can't stop thinking about space, time and dimensions, Makes me think how tiny we are like we are not even 1% lol
@kevinc.cucumber3697
3 жыл бұрын
@@ManOfCinema- the fact that you even said 1%. 1% is a big number. Put a few billion zeroes before . And that’s probably still too big.
@Komorebi007
3 жыл бұрын
@@kevinc.cucumber3697 you are right. !
@lalithadithya2281
2 жыл бұрын
Hehe boiy
@iamgracefully
3 жыл бұрын
"The universe is constantly sending us information in the form of light. All that remains is for us to decoded." Brilliant piece!
@catalinfistis
5 жыл бұрын
So we are actually seeing our universe how it was, not how it is. Wow
@nachtzauberer
4 жыл бұрын
Thats a well known fact, not as surprising as you think
@frayeleo0015
4 жыл бұрын
yea, we dont see stars in realtime , only remnants. those stars might be dead now.
@footballsoccer358
3 жыл бұрын
I was taught this in middle school and that was 15 years ago, are you children not reading legitimate science books these days?
@618_raw
3 жыл бұрын
This is common sense
@Mark-Wilson
3 жыл бұрын
@@frayeleo0015 or in their final stagest
@ceyhuncabbarov2128
7 жыл бұрын
the greatest and the simplest explanation I've ever seen!!! Thanks Ted-Ed team!!!
@sygb.550
10 жыл бұрын
So u saying we might be seeing stars that no longer exist !! Cuz they're far away and their lights took long time to reach us !incredible ha!
@iSirButters
10 жыл бұрын
I know right. Its mind blowing.
@mohamedal-qabtan4962
10 жыл бұрын
Exactly
@syedshah2142
7 жыл бұрын
syg B. Yes
@SasyaShyamYella
6 жыл бұрын
But you see.. time is relative so we really can't say
@7volcast
6 жыл бұрын
Lol...
@jewersp
3 жыл бұрын
Incredibly well explained. Knew quite a bit about the topic already, but learned a lot in those five minutes.
@heruirawan5722
5 жыл бұрын
meanwhile in 1 million light speed away planet "hey dude check this out, i found another habitable planet, its so beautiful and blue and it has one moon" "send a message, maybe we are not alone in this universe" "i just did" 1 million years later on earth
@abadayjp
4 жыл бұрын
I think they will be pretty smart to realize that. But for the sake of the joke, Haha.
@girishdnaik2042
4 жыл бұрын
Deep😂
@kemmylilmister1122
4 жыл бұрын
This comment is highly underrated, hahaha good one
@beluwuga2573
4 жыл бұрын
It's funny that despite being 7 billions of us on earth, humans are still feeling lonely and want to find more intelligent beings. To be fair we are the only species that we know that has evolved to be an intelligent being (know that they are alive, being able to feel empathetic, being able to reason etc)
@Rei-xg9fs
4 жыл бұрын
@@beluwuga2573 you are making us lonely.
@mila8252
2 жыл бұрын
precise and crystal clear. these questions have been haunting me for years. thank you!
@MRconfusedboy
10 жыл бұрын
ted-ed ! you need to use kilometers as well, people around the world watch this, im from morocco and i have no idea how long is a mile, so please use the international system of units as well
@meinbuch9458
7 жыл бұрын
Lucas Leong 1 mile=1.609km
@ibrahimhussain7379
7 жыл бұрын
Lucas Leong correction . a mile is 1.6 km
@Zhoshyn
6 жыл бұрын
If you are really interested, then you would have looked it up on the net ...
@amineaboutalib
6 жыл бұрын
Du Duu Hi fellow 😂
@skullcrusherdna3545
6 жыл бұрын
Lucas Leong 1 mile = 1.6km you can take it as 1 km if you want an estimate
@MasterJongXG
10 жыл бұрын
I love Ted-Ed and Kurzgesagt =D
@jayfawn8478
7 жыл бұрын
MasterXG but he rarely upload and its annoying
@kusurugizeme
7 жыл бұрын
As Kursesagt always say, " quality > quantity"
@zzenjuro
6 жыл бұрын
Jojo 😂😂😂😂
@rickybacarro4516
6 жыл бұрын
How about Life noggin?
@minhlynguyen2442
6 жыл бұрын
Life noggin tô
@NeoSoviet
10 жыл бұрын
Amazing. Im watching every video and learning new things. Thank you for your efforts, they are very appreciated.
@jeffreywang7665
Жыл бұрын
This was one of my biggest obsessions and fixations while I was in high school during teens!!
@toys4kids686
3 жыл бұрын
All that remains is us to decode it...love it... wishing mankind the best in this field...
@sakiv9275
5 жыл бұрын
I never understood this subject in my school life. Thanks for presenting in simple language. 😍
@kerimtim
4 жыл бұрын
*If my mom wakes me up for school I'll say it's yesterdays's light*
@umairjibran7
4 жыл бұрын
8 minutes old. and why do you worry anyway, schools will be closed for about 2 years
@alanmaclaren4118
4 жыл бұрын
@Umair Jibran not really the end of the virus does not depend on when Will find a vaccine it depends on when the virus will get weaker and weaker
@tzikhan5546
3 жыл бұрын
Does light travel infinitely?
@sparklejumpropequeen8403
3 жыл бұрын
@@tzikhan5546 good question. Unfortunately Idk
@EmileKleinhans
3 жыл бұрын
@@tzikhan5546 Well light can accelerate when it leaves a denser substance. Thus it seems it will travel forever until it is absorbed, much like an object in space will keep on moving until it hits something. The light will slow down and some of it absorbed but the light that makes it through travels fast once again until it some day hits your eye or bumps into a solar panel.
@hiperhogarargentina
5 жыл бұрын
Just perfect! Short, very easy to understand, graphic, well told without complicated and technical terminology. Thanks for helping spread astronomy concepts.
but how do they determine the brightness of certain object if they dont know the distance in the first place ?
@sumairasimi5806
Жыл бұрын
This is super cool , it cleared many confusions related to space.
@chadboy6276
3 жыл бұрын
How vast is the universe and how it made and what is time and space .. send shivers down my spine.. are we alone?
@siva-ok9qk
5 жыл бұрын
Whenever you look at the Stars 🌟 in night sky, you look back in time. 🕛🕦🕚🕥🕙🕤🕘🕣🕗🕢🕖🕡🕕....
@ratiemand4529
5 жыл бұрын
siva you do when you look at anything
@shahirah5954
4 жыл бұрын
hey buddy, religion has nothing to do with this ابو ليث الخطيب
@armwrestlersanta
3 жыл бұрын
U smart
@Hello-vz1md
3 жыл бұрын
kzitem.info/news/bejne/1IljlotsnnqXnYI
@aaronthenorm5400
Жыл бұрын
Is that like visual remembering?
@ahmedtareq9055
3 жыл бұрын
This is the most brilliant animation and visuals i've ever seen that explainig these concepts.
@agyatthule717
3 жыл бұрын
This is very true but I never cared to think about it that My jaw dropped as soon as I realized that the stars I see in sky at night were actually from millions of years ago which many of them may no longer exist. Wow wow my mind is completely blown away!!! This fact is so mesmerizing
@lukemcdonald3200
3 жыл бұрын
I wish there were better classes on space ect wen i was in school!!! Its amazing
@tierrabuzz1925
4 жыл бұрын
In one group of variable stars the period of light fluctuation is directly dependent on luminosity, and knowledge of this fact enables astronomers to utilise such suns as universe lighthouses or accurate measuring points for the further exploration of distant star clusters. By this technique it is possible to measure stellar distances most precisely up to more than one million light-years.
@chenalindelossantos967
4 жыл бұрын
"the universe in itself is a time machine." ✨
@zeayd4546
4 жыл бұрын
The fact that we need to imagine that the worlds we saw doesn't support life by now. As light spends years to reach us. The other worlds must've changed throughout this time. Man space is so scary and beautiful at the same time...
@realeyes8199
5 жыл бұрын
Ted ed is the best channel ever, I feel so satisfied and happy to know so much about the universe and Ted ed has made me even curious to know more! I would really like to give you humblest gratitude. Thank you!!
@chainsumityt2810
2 жыл бұрын
This is the question I've searching for my whole life Can't thank enough but thank U:
@2048905
5 жыл бұрын
I’ve been searching for this my entire life 🙏
@phyuphyuthin4260
5 жыл бұрын
this is so informative. I was just wondering how they measure the distance between the planets, stars and galaxies
@AnstonMusic
10 жыл бұрын
This one was top notch!
@redhahabib4693
5 жыл бұрын
Everytime I watch something about distances in space, it just blows my mind.
@paulineblake3526
2 жыл бұрын
I can't get enough of this information, I am constantly in amazement at how vast the universe is.
@muniyarahman1461
5 жыл бұрын
Ted ed pls upload more videos you are the absolute best !!! Your videos give a kind of satisfaction 😀😀😀 Keep it up!!! The last line was Sooo incredible
@joyrik987
3 жыл бұрын
the fact that looking at the sky means looking at the past is soo amazing
@someone-fn4tm
3 жыл бұрын
That is why i love to looking up the night sky
@abhayagarwal5097
3 жыл бұрын
Anything you are looking at is looking at past but you don't realise it just due to small distance , amazing !
@Aester
5 жыл бұрын
So, if the sun dies then can we still see the bright image of the sun for 8 straight minutes before it starts to fade away?
@Dave-gs3ue
3 жыл бұрын
Not really. Before the Sun dies, it will get bigger and bigger till it reaches the Earth and burns it. It only dies after that, so basically u'll already be dead.
@sunnyisson90
3 жыл бұрын
Sun is a star so it will explode like the rest. So youll be dead by then lol
@enderan647
3 жыл бұрын
Let's just say the sun just magically disappear. We might die right at that moment. The disappearance of heat, radiation, and gravity from sun will have big impact on living organism.
@ijjimem
3 жыл бұрын
@@Dave-gs3ue It will get bigger a lot slower than 8 minutes, also we will notice it a lot faster. so he'll have even more time.
@ijjimem
3 жыл бұрын
@@sunnyisson90 An explosion would happen far more than 8 minutes friend, you cannot exceed the speed of light
@kabirprakash
5 жыл бұрын
I really feel grateful to see such videos published by Ted , Vox , Spacerip etc . Just wanted to say THANKS , hope you stay eternal like the universe itself .
@W0LFB3AT5
5 жыл бұрын
So if a supernova from say...600 light years away from us exploded, does that mean the explosion happened at around the 14th century and that it’ll take EXACTLY 600 years for us in modern day lives to actually see it?
@sharthaksarkar1807
6 жыл бұрын
"The universe is constantly sending us information in the form of light, all that remains for us to decode it" amazing lines 👍
@inkyhip458
8 жыл бұрын
Looks like candles have come back with a rage. "FUCK YOU THOMAS EDISON" - Candles
@miguelbarlaan3741
6 жыл бұрын
Light is the most important thing in the universe!
@luckylukewalker9834
3 жыл бұрын
These videos put my head in a spin. Mind blowing!!!!
@coronamight9952
4 жыл бұрын
The last part of the video was mind blowing. Very amazing to think of it
@KrishK8055
5 жыл бұрын
What if we find a watery or glassy planet which reflects lights that is maybe a 1000 years away, then by looking at our reflection in it we could see how Earth looked 2000 years ago 😱😱 Edit-Sorry light years😋
@rahulsawant5141
5 жыл бұрын
That would be too far off for earth's light to get reflected ...mind blowing concept ... But not gonna happen... Because the earth is too small... All you could see in that light is a tiny grain of sand which would be our earth ..at maximum
@ripudamansingh4229
5 жыл бұрын
A great thought but quiTe impractical
@thorodinson5062
5 жыл бұрын
Wavelength of light increase as they travel.. So. Maybe u r getting me
@thomasthomas7858
5 жыл бұрын
Light reflected by the Earth million years ago is travelling somewhere in the universe....
@Youtub60662592
5 жыл бұрын
Then it'll take twice the distance. Earth might not be even there.. Or either scientist who have started this experiment may have died by that time.. Not just scientist but even humanity..
@leur9778
5 жыл бұрын
I’ve always wondered objects move slightly when I alternate between my right and my left eye. Now I know, it’s because of trigonometric parallax
@jesusm8676
5 жыл бұрын
so if im understanding correctly, if we were looking at andromeda right now, it would be an image from the past but, in the present time it might not exist anymore?
@SpottedSharks
5 жыл бұрын
Yes, if it somehow vanished today, then we would not know about it for another 2 million years.
@rollingrocky3608
5 жыл бұрын
@@SpottedSharks daaam bro!
@nahidhkurdi6740
5 жыл бұрын
What is more stunning is that not only our eyes and telescopes are not going to miss andromeda's absence for more 2 million years, but our entire galaxy would not feel the absence of its gravitational pull for about the same time. Of course, that is assuming general relativity is as accurate as we think.
@alexanderemese6083
3 жыл бұрын
The Andromeda light is 2.5 Million Years old.A big star explodes after a few Million Years.A small star like our sun Has about 4 Billion years more to live. ANDROMEDA actually moves toward our galaxy.When we collide with it many stars have faded away. In 1 Million years many of our big stars in our galaxy are vanished also.Dont worry it is not your problem.
@andys3035
2 жыл бұрын
It exists right now because it's on its way towards us it's just you see it as it was due to distance.
@etiopisk4life
3 жыл бұрын
Wow TED-Ed you did it again! Once again you have proven that you don’t know how to explain things in the most simplest terms
@Showmetheevidence-
2 жыл бұрын
The scale of the universe is just, in the true sense of the word, incredible!
@byronmontesflores3837
5 жыл бұрын
This is almost scary when u think about the size of our universe. How our lives is so small small to the breath things out there
@mithunvasudevan7796
4 жыл бұрын
To me kya job chhod du???
@whyguitarguy1
8 жыл бұрын
What if we are all subatomic in size, Earth is a germ cell we live on, and that we are a part of another being? And what if THAT being is also subatomic to yet ANOTHER being that is subatomic, and so on and so on????
@dheerajvirgo3
8 жыл бұрын
+whyguitarguy1 mindfucked! :-O
@inkyhip458
8 жыл бұрын
+whyguitarguy1 What if somehow it loops back around and it turns out that the universe that we're in's universe's universe's universe's..... universe, is actually the universe within the universe within the universe that is within the strings that vibrate our subatomic particles? Somehow vastness goes both outward and inward at the same time.
@dancambei
8 жыл бұрын
na brein is on faiar
@Chrym644
7 жыл бұрын
Ohmygod! Finally someone said that! I always had this thought but was too embarrassed to say it out loud.
@ESDfilms
7 жыл бұрын
whyguitarguy1 mind boggling
@mohamedelhaddade6371
4 жыл бұрын
سنريهم آياتنا في الآفاق وفي أنفسهم حتى يتبين لهم أنه الحق أولم يكف بربك أنه على كل شيء شهيد
@davidtydeman1434
10 ай бұрын
Thank you for the clear explanation of a complex topic
@kiranranjitkar2748
3 жыл бұрын
Now I know the light year meaning which I didn't understood 13 years ago while in school. Thanks 👍 to this video for giving me the relief.
@msmoore123456789
4 жыл бұрын
I've been in the same room with someone that I thought I was close to only to realize that I was actually a million light-years away from them so I guess measuring distance is all in ones perspective I suppose
@orvillebernardo5942
5 жыл бұрын
Wow... I can't believe it... *I learned in a video instead of my teacher explaining it to me 200 times.*
@isha6185
7 жыл бұрын
I want to study Astro Physics😭😭😭😭
@rajakumar29485
7 жыл бұрын
ya
@hw7chw7c
7 жыл бұрын
Isha Mughal .
@varunkumarpothula8421
6 жыл бұрын
There are free online degrees in edx
@sivaram5863
6 жыл бұрын
best subject
@kreideprinz4646
6 жыл бұрын
it's really hard to make carrer in astrophysics
@dipakmohkar9172
3 жыл бұрын
I really do not know how to calculate the distance in space before, but now I can understand how we can calculate it thanks TED incredible
@5adwait
5 жыл бұрын
This research and study is very educating in much simpler way. Thanks #TedEd
@peterstiles1
7 жыл бұрын
Thanks for the video. Could you do one about the use of red-shift as a measure of distance, please?
@WhosFaulty
10 жыл бұрын
Love this channel
@75lexluther
9 жыл бұрын
+WhosFaulty you love people that sound like that know what they talking bout to feed you lies....
@SeaGoingLizabeth
3 жыл бұрын
This just shows how insanely smart Einstein is to comprehend and even make the theory of relativity.
@gendygoblin8391
7 ай бұрын
This one explains the parallax method a lot better than the crash course video.
@shannon-zw6yg
3 ай бұрын
That was awesome nowadays mileages and timesheet for lessons. Thanks.
@harun24hrs
5 жыл бұрын
The great line is " The universe is sending us enormous informations in form of light. But we need to decode it"...
@MlManoharan
5 жыл бұрын
Bro can you elo orate it.
@leymoncito
5 жыл бұрын
@@MlManoharan It doesn't need elaboration. It is quite understandble and comprehendable.
@tamalsengupta16
4 жыл бұрын
We can travel light-year by only only boon of God that ie teleportation
@GeorgeKosgey
8 жыл бұрын
This means whenever I look up into the stars in the night sky, I'm literally looking at a few million years ago...AWESOOOME!!! 🎉 Flinstones my man, where you at my heel drifting turbocharged leggy bruh.. 😂😂 Loved this video!! 👌
@oboogie32
8 жыл бұрын
yep! it is amazing
@maninblack9850
8 жыл бұрын
George Kosgey no it doesnt...every star you see in the night sky is in the milky way. the milky way is 100,000 light years across. The furthest you see back in time is less than 100,000 years. Unless you're talking about the Andromeda galaxy which is observable with the naked eye
@jomariroxas3474
7 жыл бұрын
You forgot that the Milkyway Galaxy is 100,000 lIghtyears across! and the star that we can see in the sky is a part of milkyway, so it's only thousands not million
@brandonjablasone7544
6 жыл бұрын
George Kosgey sounds a lil crazy don’t you think
@KhamwangKamhoa
4 жыл бұрын
It barely says that “the farther you discover, the complex it gets ”
@happiemusonda4167
2 жыл бұрын
Amazing to see something live that happened before we were born!
@adudeontheinterweb6571
2 жыл бұрын
the fact the time and space are not different, perhaps even metaphysically made of the same essence, amazes me
@C345OFR
10 жыл бұрын
"How do we measure distances in space?" In parsecs, of course!
@Scarletpooky
10 жыл бұрын
Unless you're Han Solo in which case a parsec is a unit of time ;)
@Nicoder6884
7 жыл бұрын
+Scarletpooky I don't get it. Who is Han Solo, and what does that have to do with parsecs?
@mahamT38
7 жыл бұрын
han solo is in star wars
@iii5169
6 жыл бұрын
EastStandManc it is light second
@Enslaver31
5 жыл бұрын
in gallons.
@foodforthought204
8 жыл бұрын
2:55 - BUT, you can't know the luminosity without "calibrating" the methodology on stars of known distance, which requires the parallax method. Beyond that, you must assume that all the stars have the same relationship between luminosity and the period, which seems like a stretch. Also, couldn't the light be diminished by obstacles, making the start appear darker than it really is? 4:04 - Same problem. The dimming function must be assumed to be the same for all supernovas. Second, this luminosity per distance relationship must be calibrated with a known distance. I'm concerned by a LOT of assumptions happening here. 4:30 - How would relativity affect this? We have absolutely no way of knowing the time frame reference that we at nor where the time frame change to what we are looking at.
@gracelandtm
8 жыл бұрын
I'm concerned by a LOT of assumptions happening here." Facts you mean. Sorry young earth creationist its over.
@foodforthought204
8 жыл бұрын
gracelandtm Not facts. Have you researched this at all? And, this is about distance, not the age of the universe.
@gracelandtm
8 жыл бұрын
Junk Mail How old you think the universe is?
@hanslee475
8 жыл бұрын
+Junk Mail 2:55 there are stars that we know the distance and brightness in the first place using the parallax method. Then, we use those stars to deduce the distance of other stars. 4:04 Yes, the dimming rate is the same, which is why they are categorized as type 1a supernovae. Also, the luminosity per distance relationship is calculated by short distances and known brightness, e.g. your friend holding a candle. 4:30 I think you misunderstood. Relativity has no effect on that. It is simply the time taken for light to travel from those stars to us. It is the distance divided by the speed of light. It's THAT simple. You understand now?
@hanslee475
8 жыл бұрын
+Junk Mail oh and btw 2:55 the relation between period and brightness is observed and calculated by scientists. Also, in terms of obstacles obstructing light, there is something called Gravitational Lensing. However, they don't have a huge effect on measuring distances.
@hollowsoul666
9 жыл бұрын
i still didnt understand how we know the intrinsic brightness of certain stars and supernovae... could someone explain?
@maisetas
4 жыл бұрын
i dont get it to xD ok i understand that if you know how bright 100lumen torch is and walking away from it, you lose the light and then you can say its 40meters or 100meters. because you tested it. but how do you know how bright is the star or supernova or other object to determine how much light you lose being so far...
@mrpearson1230
3 жыл бұрын
kzitem.info/news/bejne/qZqG4IONpX6jlXo
@mrpearson1230
3 жыл бұрын
kzitem.info/news/bejne/pI2DzmpnsqelnYo
@satyendrasinghbhadauriya594
3 жыл бұрын
आपने वीडियो में कैप्शन हिंदी में भी दिया है इसके लिए बहुत बहुत बधाई धन्यवाद शुक्रिया आभार। 🌹💓❤️🤝 इससे आपके चैनल की लोकप्रियता दिन दूनी रात चौगुनी बढ़ेगी। तथ्यात्मक और विश्वसनीय जानकारी The Most Important चैनल 🌹
@motoporn9055
5 жыл бұрын
So Some lights are still traveling for us to see.. But when it reach us its already part of the past...
@atlas_1802
4 жыл бұрын
I read the thumbnail as “How do we social distance in space.”
@millergoon8909
4 жыл бұрын
I swear I had to watch this like 3 times to really understand but again am high it was so worth it
@OnionKnight541
2 жыл бұрын
How are these videos better than any traditional educational experience I've known?
@SD-ef4qp
3 жыл бұрын
Thanks for throwing some light on this ..
@jvsper_
8 жыл бұрын
Iba ka talaga pareng Ted 😂
@strahnbrad3979
8 жыл бұрын
lol
@sonialabangco5612
6 жыл бұрын
Andrea Gonzales qaqo ampota.
@mangomewk
6 жыл бұрын
hahaha
@yangllobrera9723
6 жыл бұрын
What does "potainamo" means?
@mangomewk
6 жыл бұрын
dat means youre beautiful or handsome
@kianov.443
8 жыл бұрын
plot, we see our species million lightyears away. They all died and travelled to earth.
@kianov.443
8 жыл бұрын
+Niller Symphony . Well, I do guess you got a point that I am bad in language xD . What I meant saying that they left the planet to earth and left everyone else die. And they travelled faster than light, therefore we can possibly see them still alive when they are dead now xD
@kianov.443
8 жыл бұрын
+Niller Symphony . Well, I do guess you got a point that I am bad in language xD . What I meant saying that they left the planet to earth and left everyone else die. And they travelled faster than light, therefore we can possibly see them still alive when they are dead now xD
@oreally8605
5 жыл бұрын
God's creation is amazing.
@bestskateboreder
3 жыл бұрын
it really is
@jordyguevara1423
5 жыл бұрын
The measurements in space are very different from the units of measurement in the yes, because they cover many longer and more extensive measures, becoming kilometers, kilometers of distance, even light years, so due to these high distances we see how the constellations are very small, tiny points we see from the earth, where a constellations will be great distances, they imply that the world is very small and there is much to learn about space. Although the space is immense, we still have a lot to discover but, this contribution is very interesting as we can know the distances that separate us between the constellations and the earth is a very interensate data that allows us to be one step closer to reaching Find out more about space.
@abdul-tv1kq
2 жыл бұрын
Cracking,this has knocked my boots off!
@duckiebee2831
10 жыл бұрын
I wonder how many lifetimes it would take to walk to the nearest galaxy ( assuming each life is exactly 100 years, that they walk at the exact same rate and also that you could walk through space)
@HigherPlanes
10 жыл бұрын
I did the math out of curiosity rounding off some numbers: Distance to Andromeda, 2.5 million light years = 15 trillion miles Average walking speed, 3 miles per hour = 27,000 miles in a year Walking Distance to Andromeda at 3mph = 555,555,500 years Lifetimes to Andromeda, 5,555,555
@unison_moody
10 жыл бұрын
Thats simple math actually. Try for yourself! It's fun to achive own puzzles somtimes. And if you won't succeed or want to know if its right just post it on certain forums! ;) Oh... someone did it already for you. Fair enough.
@tsgoten
10 жыл бұрын
HigherPlanes idk? That seems kind of low
@HigherPlanes
10 жыл бұрын
Tarang Srivastava I'm far from being a math wiz, so I could be wrong. Double check the math and let me know!
@Insertnamesz
10 жыл бұрын
HigherPlanes I'll test in metric! D = 2,538,000ly * (9.4605284E12km/1ly) = 24010821079200000000km At v=5km/h, time=24010821079200000000km*(1h/5km)=4802164215840000000hours time converted into years= 4802164215840000000hours*(1year/8765.81hours)= 547828918929340.2435142901796868 years (woah) If the human lasts 100 years, then it will take 547828918929340.2435142901796868years*(1human/100year)= *5,478,289,189,293 humans* You may have been a factor off in your conversion somewhere, or I messed up! Kind of pesky to do calculations in a comment box ;)
@dmahar58
5 жыл бұрын
I love science fiction, its so creative 🤣 Assuming you understand humor, like you assume science...
@kennyclash3584
3 жыл бұрын
Fun fact:- the nearest universe's light would still wouldnt have reached us till now.
@Peppermint1
Жыл бұрын
This only works for specific stars and Supernovas. Spectroscopy is used to measure the electromagnetic radiations emitted by a star. These radiations will give the type and age of a star so we know what is the 'true' luminosity at proximity. Then we can evaluate the distance from the luminosity perceived on Earth
@UjjwalMaurya1234
3 жыл бұрын
Animation is mind-blowing .
@chief2fly519
6 жыл бұрын
So any object that has a distance farther than this world’s age....we can’t see‼️
@theshaunsta
5 жыл бұрын
of course we can.We have currently seen distances of upto 13.3 billion light years away. Our planet is 4.6 billion years old according to scientists. But your question is wrong: Age (Time) has nothing to do with distance.
@Jelly_N
5 жыл бұрын
@@theshaunsta I think he means the observable universe which is 93 billion light years
@theshaunsta
5 жыл бұрын
@@Jelly_N oh yeah true that mightve been it
@saurabhk3464
3 жыл бұрын
So if a person is standing right in front of me then technically im seeing his past woooh
@srinivas.v7902
3 жыл бұрын
That's just a less then nano second past
@Mark-Wilson
3 жыл бұрын
@@srinivas.v7902 still true past
@alexanderemese6083
3 жыл бұрын
When You listen to an Opera singer from a distance of more than 300 meter .then you can hear the Voice from the onesecond past. The motions of the singers mouth are not synchronized with the music. Same .Ex perience you can make with the light. when a Person in a distance moves The lightmessage is coming from the past.
@ltericdavis2237
10 жыл бұрын
So how did they find the luminoustiy of the standard candles?
@ThuhElement
7 жыл бұрын
Factoid exactly
@thyagarajanb728
7 жыл бұрын
Factoid I was bout to ask same
@hongry-life
7 жыл бұрын
Assumption.
@simeranand
3 жыл бұрын
Thank You! I was looking for this video since some time now.
@N0URii
5 жыл бұрын
teded is love teded is life
@bandwagonfilms6866
6 жыл бұрын
what if the sun exploded eight minutes ago?
@MartinPoulter
6 жыл бұрын
We wouldn't know. Everything would look normal until 8 minutes and 19 seconds after the explosion.
@brandonjablasone7544
6 жыл бұрын
BandwagonFilms 😂😂
@bolatetecrisyohang.4848
5 жыл бұрын
like an internet connection delayed
@regretfulman4784
5 жыл бұрын
OH FRICKEN HECK
@yezi7562
5 жыл бұрын
You cant live 8 mins without the sun, more like 5 seconds
@perrytyler5500
5 жыл бұрын
I hope human will invent a spaceship that travels light years away
@robbenvanpersie1562
5 жыл бұрын
Not possible , it will violate relativity
@vampirethespiderbatgod9740
5 жыл бұрын
@@robbenvanpersie1562 possible but unlikely. You can't decide if it's Not possible.
@robbenvanpersie1562
5 жыл бұрын
@@vampirethespiderbatgod9740 I can't but laws surely can, atleast on earth.
@vampirethespiderbatgod9740
5 жыл бұрын
@@robbenvanpersie1562 what law? tell me about your so called law. There is a possibility that we might hit the extinction in thousand years or we might survive and progress extremely ahead. Tell me , before a thousand years , what was our technology compared to now? Nothing. Here , a law for you. The Law of Evolution.
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