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View Full Version : Why do people call space a vacuum?



imported_Draco
2003-Oct-18, 02:05 PM
I'm just curious why they always call it that?
I don't think it sucks people into some invisible place :rolleyes:

kashi
2003-Oct-19, 02:02 AM
Well the concept of a vacuum on Earth, is an area of space that has lower air pressure compared to its surrounds (or no air pressure). Matter will be "sucked" into this vacuum until the air pressure reaches equilibrium (all particles tend to roughly evenly distribute themselves within a given space as they rapidly move, vibrate and collide).

Space has no air, and therefore no air pressure, making it the greatest vacuum of all. Fortunately, the Earth's gravity prevents our atmosphere from being sucked into space.

imported_Draco
2003-Oct-19, 05:04 AM
Thanks for that kashi :)

Josh
2003-Oct-19, 08:36 AM
Actually, eveything will be "blown" out .. not sucked out.

imported_Draco
2003-Oct-19, 08:41 AM
:unsure:
I imagine space as being something thick...it doesn't have any air, but it would feel like you are travelling through something thick.
I haven't been up into space, so i wouldn't know if this is true.

Haglund
2003-Oct-19, 09:47 AM
Well there are molecules out there, and other particles, it's not a perfect vacuum at all, but it's not so much that you would feel it.