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/sci/ - Science & Math

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2263895 No.2263895 [Reply] [Original]

Since every point of the sky contains stars, why is the sky not white?

>> No.2263901

because....

bump

>> No.2263903

because atmosphere and ozone

>> No.2263905

>>2263903
Then ... why isn't it white when viewed from space?

>> No.2263904

Because most of them are too feint?

>> No.2263907

>>2263905
Too far away.

>> No.2263910

because the light of some starts still havent reached us

>> No.2263913

>Since every point of the sky contains stars

It does? Says who?

>> No.2263916

Because of the inverse square law.

>> No.2263920

Stand on one side of Atlantic Ocean and shine a flashlight towards britain.

Same reasons they can't see it there.

>> No.2263921

>>2263920
Because stars can't be seen over the curvature of the Earth?

Weird

>> No.2263923

>>2263895
Because interstellar space isn't truly just an empty vacuum, and space isn't completely flat, either.

>> No.2263929

because even if there are infinite stars, only a finite number of them are moving away from us slow enough that the light from them can reach us.

>> No.2263936

"white" refers to the subjective topic of brightness. Maybe the entire sky is white but because of the
dynamic range of our vision, we only see the brightest objects and the rest is dark. Also, think about the cosmic microwave background radiation. There is microwave radiation coming from every spot in the sky. So there is "light" coming from every point. It's just not in the frequencies our eyes can detect.

>> No.2263940

Because it's black, duh...

>> No.2263953

>>2263929

>Implying stars are moving away from us faster than the speed of light

Oooooooooookay there buddy.

>> No.2263961

Olber's Paradox, read about it.

>> No.2263977

>>2263961
Oh hell yes, this is more than I expected. I thought I was just going to get, because ... lol.

>> No.2263980

Universe is only 13 billion years old, the light hasn't had the time to come here from the most distant galaxies. And it never will, 'cause the most distant galaxies are getting away from us faster than light. This is because space is expanding, and the farther away you are the more space there is in between to expand.

>> No.2263985

>>2263905
Too faint. It's like trying to spot a cellphone screen from two kilometers away. Take that for scale.

>> No.2264053

light pollution

>> No.2264079

I dunno lol­

>> No.2264096

there's an annotation in Irregular Webcomic about this somewhere. I tried finding it and couldn't, but it's around there somewhere.

>> No.2264134

>>2263985
this shit is literally the most retarded thing ever

>> No.2264137

>>2264053
>LOLOLOLOL implying the night sky was white before humans discovered fire

>> No.2264144

Atmosphere, the luminosity of the stars is not great enough for them to be anything more to us than shining dots, etc.

This is pretty elementary stuff. Really bright things are really really fuckin' far away, so you can't see them too well.

>> No.2264154

There are infinite stars, but also infinite planets and bunches of matter.

The stars shine against those planets, the light is reflected the other way and does not reach us.

>> No.2264173

>>2263953

Some stars are moving away from us faster than the speed of light. The speed of the expansion of the universe is not constrained by the speed of light.

>> No.2264238

>>2263980
>>2263929
Why are people still posting their retarded theories, when the answer is in this thread?

>> No.2264249

>>2264238
Just realized some people might read my post the wrong way. I meant the posts I referred to, were correct.

>> No.2264440

Because the universe has a finite volume and there are a finite number of stars.

>> No.2264599

>#1:
Light of most stars haven't reached us yet

>#2:
There is too much disturbances in it's way, hence: athmosphere, ozone, heat, gravity and all sorts of physical phenomena

>#3:
The curvature of the Earth, in itself, would deviate the light of most of them. Meaning that there is no place in the planet where you could see all the light sources, even if you didn't consider #1 and #2

>> No.2264637
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2264637

>>2264154
>>2264079
>>2264053
>>2263985
>>2263940
>>2263916
>>2263905
>>2263903
0/10. All of you.

>> No.2265501

Because niggers.

>> No.2265510

> Sky

> Not white

>> No.2265512

>babby's first paradox

>> No.2265518

every point in the sky doesn't contain stars...

>> No.2265527
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2265527

This thread is full of herp derp besides a few posts

>> No.2265554

>>2263961

This is actually a subtle question. It was first brought up when the universe was thought to be in a steady state where it was both infinite and eternal. Olber's Paradox indicates that the universe is not infinite or eternal. Thus the Big Bang theory, to explain the dark night sky.

>> No.2265573

>>2265554
The big bang theory was more a logical continuation of the second law of thermodynamics.

>> No.2265581

the milky way is white

think this though

>> No.2265588
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2265588

>>2263895

Because you touch yourself at night!

>> No.2265590

>>2265581
Milky Ways aren't white, haven't you ever eaten one?!?

>> No.2265688

cause space is mostly empty
and emptiness is black (has no color)

>> No.2265717

http://antwrp.gsfc.nasa.gov/apod/ap091101.html

>> No.2265746

dark matter .

come on guys, nerds are meant to be smart.

>> No.2265790

>>2263953
this is probably true. you're retarded.
nothing can travel faster than light, but because of universal expansion, several celestial objects are conceivably moving away from us "faster than the speed of light" not because they're actually traveling that fast, but the vast space between them and us is getting bigger.
it's a technicality

>> No.2265871

>>2265790

wtf are u talking about

what does distance have to do with speed?

>> No.2265892

>>2265688
It has colors we can't even hope to comprehend.

>> No.2265901

>>2263923
>and space isn't completely flat
Uhhh, it actually is... Unless you mean two-dimensional flatness.

http://news.bbc.co.uk/2/hi/science/nature/727073.stm

>> No.2265902

>>2265790
Learn physics please!

>> No.2265911

>>2265790
>nothing can travel faster than light
This is only true for particles and light in our current vacuum.