Adinnieken on 21 January 2012
| Runa216 said: Not from space. sound doesn't travel through a void, it needs air particles to bounce off, that's what makes noise. Silly peoples. |
The space between my inside wall and outside wall is a void, that doesn't mean there isn't air there. Sound travels through it rather well, as well as heat.
Interplanetary space isn't a complete vacuum. The density of the atmosphere within the solar system (heliosphere) is such that it isn't very dense at all, but there is an atmosphere.
Because of this, sound does travel in interplanetary space. In fact, the Sun reverberates at a very low frequency. That sound travels via waves of particles that when they hit the atmosphere they produce a very low frequency noise. This was discovered/confirmed by one of NASA's probes monitoring the Sun a few years back.
