I’m having a hard time understanding this. From what I have read, a vacuum is a space that is devoid of matter. But there is matter in Space (planets, chemical compounds, stars, etc.). There is something I’m missing here and I’m not understanding
In: Physics
Neil deGrasse Tyson made a GREAT video on the concept of nothing. Basically, even in space, there’s always something.
But the reason it’s a vacuum is because there’s no pressure or less pressure than on say earth. Ever notice when you have just one or two windows open in your home, and you shut the door of the room the window is in, and the door just slams? That’s because there’s less pressure outside your home than inside, and the air being moved from your door shutting escapes more quickly, thus creating a vacuum effect.
Same goes for space. It’s really just pressure difference. Pocket of air introduced to a space with no air, the air will rush into the space with no air, thus, a vacuum is formed.
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