Why Is Space Black?
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- Опубліковано 3 січ 2015
- Have you ever looked up in the night sky and wondered, “Why is space black?”
Follow Julian on Twitter: / jhug00
Read More:
Why is space black?
phys.org/news/2014-12-space-bl...
“If you've done your homework, you know that space is huge. It even be infinite, which is much bigger than huge.”
How could the universe expand faster than the speed of light? That seems impossible!
scienceline.org/2007/07/ask-ro...
“In science fiction universes, traveling the galaxy is a snap - just engage the ‘warp’ or ‘hyperspeed’ drive, and off you go, cruising the cosmos at several times the speed of light.”
How can the universe expand faster than the speed of light?
www.askamathematician.com/2014...
“There are two big things to remember about the expansion of the universe. First, the universe doesn’t expand at a particular speed, it expands at a speed per distance.”
1929: Edwin Hubble Discovers the Universe is Expanding
cosmology.carnegiescience.edu...
“When Edwin Hubble was hired to work at Mount Wilson Observatory in 1919 (part of the Observatories of the Carnegie Institution of Washington) as a junior astronomer, the most pressing question of the day concerned the nature of the cloudy patches called nebulae.”
Cosmic Microwave Background Radiation
en.wikipedia.org/wiki/Cosmic_m...
Holmdel Horn Antenna: Where the embers of the Big Bang were first detected
www.atlasobscura.com/places/ho...
“In the 1950s, the scientific community was split by two competing theories explaining the origin of the universe.”
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The word "space" is mentioned and nobody bats an eye, but when the word "black" is mentioned and everyone loses their mind.
It's funny because Walter White said it
oscar alonso "dark humour"
I think im starting to like you sir
Sir Zestiny And i am starting to like you because you are starting to like me . See if only all people were like this than world war 3 wouldn't be as close as it is to happening.
oscar alonso 'MURICA!
because its all "part of the plan"
introduce a little anarchy
and now i can rest in peace.. thank you thick glassed science guy, seriously, thank you
Lol
If our eye were more sensitive to light we would be able to see that everything is radiating light continuously!
I feel assaulted from a geek watching this. So much psyence mumbo-jumbo it's nausiating.
What if we are living in a black hole?
carey g. butler Go watch Vsauces Black hole video i doubt it.
LOLZ! ***** Love it!
***** That's so true. I don't believe that anyone is smart enough to be wrong about everything, but some sure try hard at it. Ergo: those who don't try too hard, usually have at least one thing useful to say. ;-)
Fear (and denial), ignorance, complacency, distraction and want turn logic off in humans.
That was one of the most clear and concise explainations of something about space I have ever heard. Even someone who knows relatively little about space or physics could grasp what you are saying. Keep up the good videos. I subscribe to Frasier too. He's a decent and smart fella.
I'm 26 years old and i swear, i cannot even understand a thing in this video. I feel dumb. eh. lawls.
Same here 😂I’m 18
And now?
Why is my son black?
Melanin
😂😂😂
L
I have bad news for you, Sir.
He's been blessed with the color of the universe itself.
First video someone has uploaded in the past 5 hours for me! Thank you :) I now have something to watch while I procrastinate cleaning my room.
Get to it now! jk
The Psychopathic Grandchild Make me a sandwich while you are are it. Thanks.
This is not Facebook
theres another sites with videos that can turn any procrastination into something way way more pleasurable ♥
The Psychopathic Grandchild You're not one of my psychopathic grand daughters are you?
God doesn't have time to pay the electric bill.
No
Time? More like money.. He's working his ass off to feed his kids and family, life is hard everyday suffer in a commuter train, eating shitty food, horrible office colleagues jerk of a boss,and what not. He's tight on money right now, but hopes to get things back in track.
ninad gautam Well, I suppose it was only a matter of time before I had to remind someone it's a joke.
ScriptGuider lol i was joking too.
+ScriptGuider god can't pay for anything he made everything i know it was a joke
It is simple, light only reflects when gross matter is involved (atmosphere, planets, gas clouds, etc.). So the vacuum of "space" in between planets and stars, light has nothing to reflect off of. For example, the space in between earth and sun has virtually no gross matter to reflect the sunlight. So in essence, the entire universe would have to have gross matter EVERYWHERE in between EVERYTHING for the "space" in between heavenly bodies to lit up and not "black"
Idiot!
if it is nothing why is it black
Black101Warri0r , a vacuum is created from a void of nothing. Space would collapse upon itself in a vacuum
CMB but we can't see the infra red spectrum parts.
but isn't black the result of absorption of all colors
1:19 so... space is faster than the speed of light
The expansion of the universe is faster than the speed of light yes
Do you know the difference between night and darkness?thanks.
They never fail to blow my mind away
Space is black because it's super big, mysterious, special and unique.
Did I already mention that it's enormous 😏
Layman here - question - if space is expanding does mass (ergo anything that occupies space) expand along with it or stay the same?
Only space expands. Mass stays the same thus the distances between objects (such as galaxies) get bigger and bigger as time goes on.
If objects are moving away from each other, are there any exceptions. For example the Earth isn't (or is it) moving farther from the Sun, I assume due to gravity. If so, when does gravity not effect expansion - or does it affect it? I guess I'm asking, to what limit does the expansion of the universe apply?
Frederick C Tucker These questions are perfectly answered by Minute Physics video "Do We Expand With The Universe?". It explains Gogo's question too.
The earth is slowly moving away from the sun
jktomas Thanks for the reference - the Minute Physics video does explain the perfectly.
terrific episode! one of my favorites. Awesome callout to Dr. Cain.
It is so nice to have a video without ads.
SPAAAACEEEE
SPAAAACEEEE
BAAAATMAAAAN
MEEEDICIIINNNE
CCAAKKEEE
JEESSUUUSSS
Why does the tittle of this video sound racist
because you're racist :)
Ronald Reinhard and your, stuped
I don't think there is a tittle.. And if you mean title then there's no title in the title either :P
(A tittle is the dot above an 'i' or a 'j')
***** it's pretty obvious you're stupid if your brain can't process english...This video isn't for "stuped" people like you lol
Ronald Reinhard Or because he's anti-racist
Whats the song in the background?
thank you Julian! you're awesome!
Blah, blah, blah, blah.... short answer, 'distance'.
Where the hell do I collect my PHD?
Apparently watching a 3 minute video warrants an 8 year degree of hard work.... blah blah blah
PHDs aren’t for lazy cheaters
one day we're gunna look up in space and see one of the stars explode
The Epic Green Mask well what’s funny is that some stars in the night sky have already exploded, but since they’re so far away We still see them wherever they are in the night sky because they are light years away from us and so the explosion of that Dying star has yet to reach earth
Nope
Is there a link to this in English?
I'm still having trouble understanding. Could you use puppets next time.
Can't stop the signal Mal
Interesting...
Hey I know the odds of you reading this are very minuscule but if you do could you please make a video about how airfoil works the coefficient and the lift formula because I am a huge aviation fanatic and there so many lift theories out there that it gets confusing. I also need to present the info for a science fair project. I love your videos and it would be great if you could help!
formula lol
Zo isn't there supposed to be an Edge of Space ? Since u said that it's Expanding
Why is his eyes so far apart
+Keelyn Senegal why are your eyes so close together?
+Keelyn Senegal Hubble's Constant
lol
sume people are born that way
exactly, like da fuc
I say space is black because in the very beginning of everything, there was darkness. Think about it. Darkness has been here ever since the beginning of everything. Before light, before any of us, and before the rest of the animals, there was darkness. Light kind of just descended from darkness somehow (some say it was God or some other kind of event that created light) and the rest of us came on the scene sometime later. So basically light is only occupying the space that is darkness. No matter how fast light goes, darkness is faster because it's already there. And unlike light, which must be created, live, fades, and goes back into darkness, darkness does not fade or die. Think about a dark room that someone places a light bulb in and turns on. The light is on and the room is lit, but the shadows are still there. When the light eventually fades and dies, it returns to dark, and the room is dark again. Where did the dark go while the light was still on? It didn't go anywhere. It was there the entire time. l=D
Yay Me Finnaly. someone who thinks the same way as I do on the subject.
Yay MeDarkness and light came together.Before light there was nothing. U cant have light without dark. U cant have front without a back. Nothing somehow manifested itself into concsiousness. Im not a smart guy. But for some reason this i know. The answers come from silence. I know that much. Not from thinking or going off what you have learned.
Shady Mcgrady Deep. =o
But you can and have and do have dark without light. Happens all the time. It even happened in the beginning. And then some people say that God said "let there be light" but he didn't say anything about darkness, because it was already there. Like if my mom was in the same room as my brother and she called me, she wouldn't call my brother because he was already there. She would call me and I would go to where she and my brother was. l=D
my point is there is no darkness until you are born or conscious to recieve it.let there be light is more like let there be consciousness. nowhere does it say in the beginning was darkness. thats how u took it. it is said. there was a void. void does not mean darkness., it means nothing. cuz like i said no light no dark.it light never came about. u wouldnt even know to call it darkness. even if it was dark.
Shady Mcgrady There is really no anything for anyone until they are born. XD
Just like with my parents. My mom and dad were here before I was born, but that doesn't mean they didn't exist just because I wasn't around back then. l=D
But god said "let there be light. Light had to be created. It says " In the beginning God created the heavens and the earth. Now the earth was formless and empty, darkness was over the surface of the deep, and the Spirit of God was hovering over the waters. See, darkness.
I figured it was a combination of wave lengths undetectable by the naked eye (hence why all stars generally look white to us) and the lack of atmospheric pressure since it's a vacuum so there isn't anything to bounce out and cancel out all the "other" colors. If you mix all paint together you get black.
*I don't get it. Outer space isn't just black. It is many colors. Planets emit their own light thus making a portion of space look like a certain color.*
You can't say "well. space is black and that it looks like another color due to another source."
Because if you have a toy yellow ball. And red light is casted onto it, and it looks like a red toy ball, is the color of the ball red or yellow when red light is casted onto the toy ball? The answer is red. Because the ball looks red.
So if a ball is considered red due to another source then space has to be the color it looks like due to the other source.
No to Racism
Wait you said that the universe is infinite but you also said that the universe is expanding which, you know, contradict each other
no it doesn't. space is infinite, and the observable space that we can see is expanding into the infinite space.
Phillip Pie no man, its grown to be of infinite size, but its still growing, becoming truely infinite. This is because if the universe stopped growing when it became infinite, then it would not be infinite, becauae it stops somewhere.
It doesn't. If it's infinite then it can expand into itself.
Ghost khiz. Huh didnt think of it that way
Kind of makes sense 🙂
Very good observation but it's not a contradiction but rather the lack of deeper observation. The infinite universe creates an illusion of expansion to give a reference that it is finate. Just like up and down don't exist in space but we use them to navigate in reference to earth
You thought we missed that Firefly/Serenity reference Julian, but we didn't.
If the universe is stretching out what is it stretching over whats in front of it?
Black is not a color but an absence of color....
Idiot
So what is transparent
So the sky is black because the universe is expanding??
We cannot see the light from all the stars because of the distance. Over time the light is stretched into the infrared and we can't see that but we detect it as the CMB. If we could see it then it would light up the Universe. It is everywhere and at all time.
Correct. Also add into that equation that the human eye can only detect a certain spectrum of light/radiation and you have a more complete picture
Hey if universe is expanding then distance btw the planets n sun should also expand right....??
Nice Firefly reference, Julian!
DARK MATTER AND DARK ENERGY ARE MELANIN RICH!
God made the big bang.
You're that vegan person.
@Gabriel Hajas ass wipe
UGH!!! I can't even watch this video because of the darn ads! When an ad finishes the video doesn't start, I just get an option to watch the ad again. You darn troll
Actually, also a star say 10 or more idk light years away wont be visible because the photons emitted by the star will be so spread that at a point none of them hits our eyes. Or by random chance we will be hit by 1 or 2 per second. In that case you have to make a picture with a rediculously long exposure to see it bright and detailed.
long story short: space is racist
space is black.. the reason why white people wanted to colonize space
Is that why poop is brown?
you sir are the smartest potato I have met. Your knowledge surpasses even that of humans I shall make you my lord and savior and follow your every command.
nope it has to do with some kind of chemical reaction with oxygen. these guys had a video on it somewhere.
Yes
Potato cannot answer I ate him for dinner baked with cole slaw mmmmmmmmm
"You can't stop the signal..." I liked the Serenity reference. Browncoats unite!!!
"Were the succession of stars endless, then the background of the sky would present us an uniform luminosity, like that displayed by the Galaxy - since there could be absolutely no point, in all that background, at which would not exist a star. The only mode, therefore, in which, under such a state of affairs, we could comprehend the voids which our telescopes find in innumerable directions, would be by supposing the distance of the invisible background so immense that no ray from it has yet been able to reach us at all." E.A. Poe
I wasn't sure to begin with that there are stars in literally every direction. I assumed there would certainly be some space out there. I also thought that the surface of that star is so incredibly tiny from a distance that its rays couldn't possibly be very potent, certainly not enough to fill the sky unless the density of them was MUCH higher. I didn't really think of the expansion before watching. Neat.
All i hear is excuses.
Yeah starting with this comment.
oscar alonso Heres another excuse lol
ChipChocolatePR yeah, just like you, a sorry excuse for a human being.
Poopsicles
I believe in God and Jesus 🌟🙏
I'm A Singer
thats cool
I believe Jesus and Satan are working together to bring down Thor.
InMaTeofDeath Cartoonlogic
oscar alonso Indeed, though not so far off from religious logic.
Dnews : can you guys make a video about the theories of what happened before the big bang and the creation of the universe ?
The way you explained it is confusing. The paradox could easily be solved in a static universe. It's that fact that stars haven't been around forever and that light only goes so fast that makes space black, not expansion.
Because the universe is racist.
the big bang theory is completely ridiculous and I'm not talking about bazinga.
Haukenslush Why? If you can't explain why without any contradictions or holes in a detailed technical manner. Then you are just spewing bullshit.
Jesus Lucifer Gautama Christ Beelzebub Buzzington what can you observe in nature where the beginning of something has starting from absolutely nothing? can't think of anything, right? everything, and i mean EVERYTHING has some sort of beginning. we can see plants grow, humans being born, cars being made, planets, stars, etc...we can observe that shit having some type of beginning. The universe started from nothing? that's all these scientists have???? fucking really?? they don't know. no one does.
Haukenslush I agree but science doesn't speculate on things they don't know (have no evidence for the basis of any type of hypothesis and/or theory) You can't observe beyond the point of the big bang or beyond the universe. The theory isn't just a guess on what happened in the beginning of our universe. It has legitimate foundations of things that are most likely probable as to what happened. We are a young species that barely know whats going on in our own heads. I agree science pushes a lot of aspects of life and reality under the rug but it is the best means to go about learning and explaining reality and nature without a doubt and doesn't stop searching for answers to add on to our knowledge. It doesn't sit stagnant and say "oh this is the only answer for all the rest of human existence." It is continually working every day. Unlike other 'methods' of explaining of the universe,
Genesis 1:1
***** No. The bible is bullshit and contradictory in the most atrocious fashion. If you want to speculate and philosophize on where everything originates, get rid of the book of a bunch of little writings crammed together into a storybook changed numerous times from the beginning of its creation by technologically ignorant men and men ignorant of the world which is common knowledge who were scared of being wrong/change and/or political power and learn to discern between things which reasonable and have some sort of logically structured point to be made. Start off by researching the definition of logic, philosophy, then science and then come back to me.
I got an ad for the LG Led TV, and it said a lot about Blackz
Subscribed!
How do they see in space battles in starwars if it’s so dark?
How can the universe be infinite while having a beginning (ie. big bang)?
Is Julian a Brown Coat that was so a Serenity/Firefly referance
Came here for memes and I read many things and suddenly I’m in love with physics
Julian is also awesome!
What if space itself is one huge black hole?
What if there is something in the center of the universe which would cause the huge contraction?
I'm a science fan and understand reshift, but can't help to wonder, how sure are we that the galaxies' redshift isn't actually a Doppler effect. For example, there is so much undetectable mass, perhaps it could be possible that light travelling through it on such immense distances (millions of ly) would shift its wavelength through some obscure effect.
Light is affected by the Doppler Effect.
Yarden Raveh Thanks, that explains everything. /sarcasm
No problem
For answers to questions about red shift, I recommend reading Halton Arp's book, *Seeing Red*.
I also recommend reading Eric Lerner's book, *The Big Bang Never Happened* for anyone who still understands that the Big Bang is an unproven theory, even though it has been presented as though it were fact continuously to mainstream science enthusiast audiences for decades.
every center has a calm area
If space is expanding faster then light, and there are stars in that expanded space, then they are traveling faster then light relative to us right? So can stuff actually move faster then light?
Space can expand faster than light speed. No matter or energy can move faster than light through space. This can make for some interesting math experiments, because it means that a ship could, theoretically, move faster than 186,216 m/s compared to a stationary object.
Omg cant you just work it out yourself? Please think a bit more
Could you theoretically go faster than the speed of light 1 light year away and look at earth through a really powerful telescope and see back in time because it will take a while for light coming from earth to reach that distance?
Lets say for fantasy sake you can travel at or beyond the speed of light. Now someone correct me if I'm wrong but if you were to move directly away from earth at the speed of light and observed the earth while doing so it would appear as if time froze from the moment you left. If you were to travel faster than light you would be seeing earth time move backwards since you are passing the photons that previously left earth. If you traveled for exactly 1 year at the speed of light, stopped, observed earth with a powerful telescope you would indeed be seeing the earth in the past but if you then moved back towards earth at the speed of light while still observing earth you would see 2 years of earth time crammed into the 1 year you travel back on your ship. Also for fantasy sake, because this would technically be impossible, if we placed a massive mirror 1 light year away and observe it then we would be seeing earth as it was 2 years in the past (1 year for photons to travel from earth and reach the mirror and 1 year to return to our telescopes lens). Even when you look at yourself in the mirror you're looking at yourself as you were nano seconds in the past, so basically you're seeing back in time all of the time.
so is the space like a balloon it expands as far as possible and finally burst ?
that is not the entire reason another reason can be "we are located at the outskirts of our galaxy if we were located nearer to the center our night skies would have been much more illuminated
so if the darkness is the result of the universe expansion over years then how dark can it really get or is it going to be infinite darkening
It's going to get darker
expanding towards what?
Great vid man. At any rate, I don't think you really answered the question.
what i think before watching the video: light hasn't traveled from sources of light to earth yet, so we are left with no light, or the black color of space
I don't have a degree in astronomy, or physics but.. Light reflects off objects. We can't see light that passes from point A to B, but we can see the reflection on B, and the source A.
When there's no particles in the air/space to reflect the light we don't see any light. We'll see all the planets that the light bounce on though. Stars are already pretty dense today, but the distance makes the light very very weak, often so weak we can't even see it anymore. Which makes it so that we probably won't see much more stars. Additionally, stars have a lifespan.. A lot of stars we see are dead or dying. So we'll lose and gain stars with time.
Space is essentially black because there's no outer borders. There's no huge dome to reflect back the light from all directions.. that we can see atleast. So it'll remain black.
Exactly. The dark spaces between distanced stars are where light is moving away from us and the light between us and other stars are being defused by time space.
R u host people are science students or scientists or what?? I m curious to know about ur educational and professional background.. Plz
"You can't stop the signal Mal"
minute physics talked about this like a year ago!
Why can't we reflect and or focus gamma rays like on the Hubble?
I love the quote from the original story in 1964, "Fellas, we've been scooped."
how many star equivalent moon
It HAD to pick a color...ANY color, and only ONE color and since black IS a color, so it /the powers that be, randomly picked black...DEQ
I think it is because of multiple causes. Like for the same reason things look smaller when distant. + Occlusion. + Red Shifting.
This went over my head...😟😳😔
is water wet?
The inverse square law prevents seeing constant light from extremely far away. Hence why Hubble Deep Field takes several exposures, 800 for Hubble deep field of average of 1200 seconds. Ground based telescopes do the same thing, collecting light all night, constantly moving to follow the galaxy or whatever far off object. The amount of light from such a distance is extremely defuse.
If you were in between the Milkway and Andromeda all you would see with the naked eye would be pitch black nothing and the two galaxies and some local group galaxies. If your were in giant voids of the CMB, the naked eye, you would see nothing but black. Light becomes just too defuse.
Inverse square law.
I used this video to prove a point, because a girl came up to me as I was coloring the background of my drawing, which is a llama floating in space. I drew huge neon nebulas and I plan to use white and neon paint to make stars, but this girl came up to me as I was coloring the black backdrop. She proceeded to tell me, with out any dialogue spoken prior to me, in the most matter of fact way, loudly, in front of a huge group of people, "you know space isn't black, right."
*~sigh~*
Anyway, thanks PBS Eons, for shutting this girl down before she said anything else. I had watched this video many times before, and i used it as ammo, ly♥️
Why aren't they discussing the huge amount of space dust out there?... That's probably a bigger reason why you can't see every star instead of an expanding universe.
I thought he was gonna say that as in space there arent many particles the light couldnt bounce and we could not see anything but darkness cause the space was expanding and light was acting like a wave in that case, sounds reasonable to me
I've been wondering about this since we live in a little dark corner of the Galaxy but closer to a center where it all clusters it's a lot brighter and whiter and I've wondered if they have the same black sky oh and one more thing the host in this video looks just like Jojen Reed....
Yes, but Black assumes all wavelengths of light are absorbed. Shouldn't it be red if expanding leads to a strong redshift or a dull dark but not black color if the stars whose light does not reach us?
"You can't stop the signal!" :) .
0:36 I want that as a wallpaper. =/
Wait if the universe is or will or can expand faster than light can reach us, doesn't that mean that we theoretically could never reach those stars that are that far away? Unless somehow we were able to safely travel through a wormhole, then technically according to Einstein and numerous other physicists we can never travel at the speed of light, therefore wouldn't it be impossible to reach something that is traveling away from us at an unobtainable speed?
Kind of like an endless swimming pool swimming against the current?
if the universe eventually expands faster than the speed of light then yes we cant reach them without a wormhole, but if we create fast enough travel before that happens then we will be able to reach them over time.
Redheads tan at midnight.... well , I mean Moonburn !!
Even When Stars are astronomically close, the underlying reason to this effect is basically the potential of a photon capable to be visible. Of course, the energy quanta of photon is what determines whether we are looking at violate, infrared, gamma, x-ray, or any other fanncy and exotic type of light particle (wave) form. Therefore, those things are astronomically difficult to measure the accuracy of their dimensional properties. Haven said that, I don't think photons are made of anything else other what they are described to be, which may be covered by the Standard Model. It makes sense when you use one of Einstein's quotes, "shooting where there are no birds." If you think about that, Birds are rather visible because they are big enough to be seen. Hence, something as small as Photons, are definitely much difficult to even comprehend why we can't seem to see them pass by us, as if they were a (or group of) marble(s) or pebble(s) darting right into our eyes. That's where I feel very silly actually listening to videos like this one, and not hear the content describe or even mention the "Photo Electric Effect" or "The Magnitude of Visible Wave Lengths." Shame to waste that much video time and completely ignore that. Well thought script, but with no real down to earth value since it ignores the principles of the Standard Model.
Good information but no answer to the specific question. Space is dark because of the 1. Absence of atmosphere and 2. the ongoing expansion. Earth's atmosphere allows the light to disperse and deflect there by revailing the spectrum and making everithing around us colorful.
(ALWAYS EXIST)
No man can disappeared Space in here Mind.
And that's called Infinite.
INFINITE WILL NEVER CHANGE.
YESTERDAY TODAY AND TOMORROW.
ALPHA AND OMEGA.
But what is that black part that we don't see ?
I’m not asking why the universes aren’t close and therefore aren’t bright always, I’m asking what is the darkness itself that isn’t made up of universal matter in between all that space