eli5 how did scientist like Newton discover that space was a true vacuum?

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eli5 how did scientist like Newton discover that space was a true vacuum?

In: Planetary Science

2 Answers

Anonymous 0 Comments

The theory of gravitation explains how planets they could observe behaved provided there is no medium producing drag to slow them down. Two options: there is a medium that is unlike anything they had experienced before and magically doesn’t produce drag (aether) or there is nothing there.

Anonymous 0 Comments

Basically because barometers were invented. That’s the first time air pressure could be measured, and scientists discovered that as you go higher in altitude (eg. by climbing a mountain) the air pressure decreases. So you extrapolate that and find that if you get high enough the pressure would reach zero.