Outer space has very low density and pressure, and is the closest physical approximation of a perfect vacuum. It has effectively no friction, allowing stars, planets and moons to move freely along ideal gravitational trajectories. But no vacuum is truly perfect, not even in interstellar space, where there are still a few hydrogen atoms per cubic centimeter.

Outer Space 100 µPa to <3fPa

До колкото знам налягането се мери в Паскали. Ти нещо ново ли си открил

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