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2007-01-28 00:23:08 · 11 answers · asked by khaja 1 in Science & Mathematics Earth Sciences & Geology

11 answers

Outer space, the moon, stars and other planets

2007-01-28 00:26:14 · answer #1 · answered by riobob00 3 · 0 1

The sky is a philisophical point that we somewhere have decided on in the past as a way of describing what is above our heads.

For inference on a clear day, the sky is that high layer of blue >80,000 ft that we see the works of diffraction having its effect on the colour of the sky.

On a cloudy day, the sky is our clouds which may be as little as 2500ft up.

On a foggy day the sky is obscured.

In order to understand the sky you need to know the atmosphere. This is 4 layers (some will argue there are 6 but they are

The troposphere, where our weather happens, this is the layer closest to earth and goes up to around 35,000 feet.

The next layer is the stratosphere, this is where most ozone is and also some fine volcanic dust has its place up here. Weather ballons will penetrate the stratosphere. Temperature goes up in the stratosphere, so th higher you get the hotter it gets. It goes up to about 150,000ft, or where the temperature starts to fall again with height.

The next layer is called the mesosphere, temperatures decrease in this layer and some checmical stuff goes on that I wont go in to.

The layer after that is the thermosphere, in this layer only rockets will venture and it starts at about 240,000ft This layer carries on to about 350,000fy and is in some peoples minds where space starts and the earths chemically constituted atmosphere ends. The blue effect of a clear day is most prominent in the middle of this layer and the mesosphere. (Which is in reference to your question where sky ends)

Further from the thermosphere there are the argued 2 other layes, The ionosphere (magnetosphere in some countries) and finally the exosphere. the base of the exosphere can be 750km up at some latitudes and in this area lots of complicated chemical stuff happens. The laws of some gasses in this area are not valid on earth etc. Strictly speaking, space starts when you leave the exosphere. Though many will argue that the magnetosphere and exosphere should be considered space as the behaviour and composition of these final 2 layers is not synominous with the rest of the general atmosphere below it.

So in answer to your original question we have to decide philosophially where the sky is...on that crisp blue day, its somewhere in the midmesosphere to mid thermosphere. On that cloudy day...its where the clouds are

2007-01-28 08:45:13 · answer #2 · answered by John W 2 · 0 1

The sun, the moon, the stars, the planets....outer space.

2007-01-28 08:32:13 · answer #3 · answered by 420 5 · 0 0

Space, the final frontier

2007-01-28 08:31:21 · answer #4 · answered by Always Hopeful 6 · 0 0

Space.

2007-01-28 08:26:05 · answer #5 · answered by Great Dane 4 · 0 1

what do u think by sky? out of our solar system? out of our galaxy? or out of our planet?

2007-01-28 08:48:59 · answer #6 · answered by Difi 4 · 0 0

universe

2007-01-28 10:31:47 · answer #7 · answered by Anonymous · 0 0

Stars, and planets.

2007-01-28 08:27:43 · answer #8 · answered by Anonymous · 0 0

only the ether

2007-01-28 10:48:50 · answer #9 · answered by hari prasad 5 · 0 0

its space.we cant answer beyond it.

2007-01-28 08:28:16 · answer #10 · answered by kunnu 3 · 0 1

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