I didn't see ANY mention of Energyzoa's. Sure, you might get consistently lucky and not vaporize yourself slamming into some rock at extreme +C speeds. But you'll forever be stopping to clean those little buggers off your windshield...
It’s very, very low average density, a lot of the matter is just piled up as these nebulas, the starts, the planets, and whatnot. :’) Despite the low density, there’s quite a lot of it on any straight line in any direction from an Earth observer.
http://casswww.ucsd.edu/archive/public/tutorial/ISM.html
[snip] the interstellar medium... consists of neutral hydrogen gas (HI), molecular gas (mostly H2), ionized gas (HII), and dust grains. [/snip]
as a barely-relevant sidebar:
http://www.freerepublic.com/tag/haltonarp/index
I didn't see ANY mention of Energyzoa's. Sure, you might get consistently lucky and not vaporize yourself slamming into some rock at extreme +C speeds. But you'll forever be stopping to clean those little buggers off your windshield...