Why sky appears blue from earth but black from space?

Answer 1

it appears blue down here because almost every color of light, except blue, is absorbed by the atmosphere; so all you see is blue light cus thats all that gets thru. as for in space, there is no atmosphere to absorb light in space so none is reflected; hence no light, hence blackness.

Answer 2

Actually the sky is black in colour
All the particles of air , dust , water scatters the sun's light and makes the sky appear blue and also the stars no longer twinkle
the atmosphere breaks the sun's light into different colours
In the space there is no longer air , water or dust in sufficient to appear the sky look blue .

Answer 3

ZeeDot is right about the scattering of blue light in the atmosphere.

Therez0 made a big mistake though. He said that the sky is blue because of reflected light from the oceans.

Water is colorless. The reason it looks blue to us is because the water is reflecting the blue light in the sky. i.e., just the opposite of what Therez0 said.

If you're near the ocean on a cloudy day, go take a look at the water. It will be gray, same color as the clouds.

Big Al Mintaka

Answer 4

The sky appears blue on earth becuase the atmospher scatters blue light more than any other color. It appears black in space because there is no atmosphere, so unless you are looking at or near a source of light (sun or planet) you see black.

Answer 5

sky appears blue from earth because light from the sun gets scattered by the atmosphere blanket covering the earth.since it is blue which is scattered the most the sky appears blue in colour.but since there is no atmosphere in space ,to scatter the light,no colours are scattered and hence sky appears black from space.

Answer 6

its because of the atmosphere of the earth. as the sun goes far away(sun rise or sun set) the color of the sky changes.
the wavelength of the light increases as the sun rises or sets and that is the reason we see the red color. blue has a medium wavelength so that is the color we see during other hours.
it appears black from the space because there is no atmosphere.

Answer 7

Earth has an atmosphere, the air we breathe, (78% Nitrgen,21% Oxygen & traces of other gases like CO2 etc.) which scatters Sunrays and appears Blue due to shift in frequency due to scattering of light.
There is no air (atmosphere) in space.

Incidentally (C V Raman worked on scattering of light - "Raman Effect").

Answer 8

space appears both blue and black from the earth.............at night black and in the day time blue!!..it appears blue in the day time because the water molecules in the air and most of its content abosorb blue colour from sunlight which is a micture of colours knowm as the spectrum.the atmospere can be translucent therefore making our eyes feel that we are seeing the blue of space rather than the blue colour of sunlight absorbed by the clouds and the air...

Answer 9

Because of the Ozon layers - we see the sky as blue. Actually sky is colourless - From Vedic times, the only one matter out of five matters, that does not sensible to our five senses - Sravan, Gandh, Rasa, Roop, sparsh,

Answer 10

On earth, the sky appears blue for two reasons. One, it is reflecting the color of the water which covers a majority of earth's surface. Two: it is from refraction and diffusion of light energy from the sun as it passes through the atmosphere. From space the Earth's atmoshere can appear to be a vaiety of colors ranging from black to bdark blue to dark purple, depending on the conditions; this is due to deflection of light. Because atmoshpere is transparent, it always mostly shows the color behind it (black while in space) or the color reflected on it (blue while on earth)

Ocean water is not colorless, it contains a mass of plankoton and blue-green algae (both are microbule in nature) making ocean water appear green to blue depending on the concentrations of of the microbes, this color is then reflected and combined with blues we see from refracted light, to get the rich blue hues we see. However, algae may become their colors due to the types of light energy they absorb. (Response to Al Mintaka)

Furthur, our eyes have developed through time to be able to live with the types of radiation coming through our atmosphere and allow us to percieve this color as blue; to other organisms such as fish, our atmoshere is differently colored because of the way its eyes developed