كريم, on 30 July 2012 - 11:37 PM, said:
Wouldn't that be air? because when i mean sky i mean literally what seperates us from space, i'm not referring to the atmosphere...
What literally separates us from space is...non space. Which means, the gas in between us, which is the atmosphere, which is the sky as well.
Air is what makes up our atmosphere. The lower parts anyway. And some of the higher parts are made of air too, though its a bit less dense. The only thing that separates....earth, from empty space. Are gas particles. Well, and a magnetic field. If you fly in a plane, you are still flying through air. When you fly in a space shuttle to the moon, you still are flying through air until you exit the air and enter space. You may for a period of time find it terribly difficult to breathe as the oxygen thins out...but you are still flying through separable gas, none the less. Particles...
Earth is a big rock. Thats all it really is, with some magma in the middle and hunks of metal. The sky is a variety of gases. Oxygen, methane, carbon dioxide...all sorts of stuff. A gas particle is a physical object, like a ball. The heavy balls like bowling balls can be bounced and they wont go very far. They will stay close to the earth due to the earths gravitational pull. Ligher balls, like plastic squishy dodge balls, bounce far higher and easier. And if you bounce them hard enough they will reside high in the sky.
Gases work the same way. Oxygen we breathe is heavier like a bowling ball, so it resides closer to the surface where we breathe. And as you get higher, other gases that are lighter, like squishy dodge balls, reside higher in the atmosphere.
And so, the upper parts of the sky may be different than the lower parts (like a bowling ball is heavier than a plastic squishy ball). But its still all made of gas (or squishy dodge balls, whichever you prefer). Which is to say, made of an almost countless number of tiny particles bouncing up and down. Some heavier than others. And the absolute lightest gases, just shoot off into space and latch on to other things.
Its why clouds float and rain falls.
May I ask...aside from gas particles and a magnetic field, what is it, you believe separates us from space?
Edited by Belial, 31 July 2012 - 06:15 PM.