4 ms·
Which is why the term "atmosphere" is a misnomer. There exist molecules is motion above the lunar surface. These molecules are too sparse to be solid or liquid
by dotancohen 2y ago
Which is why the term "atmosphere" is a misnomer.
There exist molecules is motion above the lunar surface. These molecules are too sparse to be solid or liquid. But also, too sparse to be gas.
- JumpCrisscross 2y ago> too sparse to be gas This isn’t a thing. The interstellar medium, for instance, is gaseous. Vacuum vs gas isn’t clearly, uniformly defined because “true” vacuums really don’t exist.
- dotancohen 2y agoWhen the mean free path is longer then a typical ballistic trajectory that these molecules and ions are typically on, they do not exhibit any properties associated with gas. Importantly, the property of expanding under pressure to fill a volume is not exhibited.