| Region | Size | Particle | |
| Density [/cc] | Energy | ||
| Our Solar Wind | Sun Neighborhood | 10 | 0.001 - 0.004 × c |
| Our Local Cloud | 60 Light Years | 0.1 | ~7000˚K |
| Our Local Bubble | 300 Light Years | 0.001 | ~1,000,000˚K |
| Intergalactic Space | [The Universe] | 0.000… ? | ? |