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Name: Mark P.
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Why is there no air in space?

When "space" began to form billions of years ago, gravity began to take over in space-time wrinkles. So "matter" mostly hydrogen and helium began to collect into galaxies, stars, etc. Since gravity always "wins" on the cosmic scale, most elements (including gases, which I generalize from your term "air") clumped into various celestial objects. Put over-simply "gravity" swept space clean of matter between the various objects.

Vince Calder

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