So what do 'they' expect from voyager 1 and 2 ?
I would think just less detectable mater. Less of everything.,gravity,heat,dust... and, No. sound does not transverse a vacuum. Sound requires a medium to be transmitted.
Do not be confused by the fact that space, away from this solar system is not actually empty. It is for all but the purest pedantic science boff head, empty.
|