What is sky and what is the distance between earth and sky?

Question

What is sky and what is the distance between earth and sky?

Answer 1

about 500 km (from sea level)

Answer 2

The outer end of the sky is exosphere

exosphere is at 500 km from sea level

Answer 3

The blue sky that you are saying is nothing but earths atmosphere.The earths atmosphere is 300 km thick.When the sunlight enters earths atmosphere,refraction of light and dispersion of light takes place because of which the sky colour appears to be blue.

Answer 4

The sky is simply the earths atmosphere.

The distance is approx. 63 miles.

Answer 5

Sky is simply the upper half of our visible world (above horizontal plane) and what appears to our eyes with +elevation angle. In that direction we can see infinite distances into the space, with the only intervening matter being approximately 300km of atmosphere, stratosphere, ionosphere etc of all the gases (Nitrogen & Oxygen predominantly) and plasma state above that. Above that is nearly vacuum better than the best vacuum that can be generated on earth. Sun, Moon, planets (meaning wanderers) and stars appear through that space each at a different distance from earth. The distances are such that the light with its fastest speed takes 500 seconds from Sun, 4.2 years from the nearest star (another sun), 100s or even a million years from some of these objects in the sky. Some light from such objects is so feeble that it cannot excite the retina to register as a light. Telescope brings out such objects by gathering more light than what our eye can do. Some of the star-like objects are galaxies each containing billions of stars, a majority of them bigger than our Sun.

All radiations and radiant energy reaches from space after being absorbed by atmosphere. Atmosphere scatters much of this brilliant light and the result is the blueness that we call 'sky'. Science has not defined what 'sky' is and though it appeared to ancient man as a glass dome with all heavenly objects stuck on it, it is not so. This has been proved again and again by man, demonstrating his voyages into space, higher still. The last point he reached is Moon's surface in 1969.

I hope this gives you an idea of 'sky' and removed certain misconceptions about it.  

Answer 6

Its approximately 150kms.

Answer 7

sky is a generic term used to describe the view of the area around the earth perpendicular to the earth's surface through the atmosphere. the distance  is a stupid question to ask.