Apollo astronauts just dumped their human waste overboard on the way to the moon. at least space junk in low earth orbit just burns up after a few years. but there is no nautral disposal process to heliocentric waste. or waste in high earth orbit. so it's a strange combination of space being so vast and huge, but also that any tiny little bit of junk or waste will endure for billions of years tucked away somewhere out there. and also that evrethting is in line of sight with everyhthin else. a very strange topology and sitaution compared to stuff and living on earth, which is the opposite in all 3 respects.

-> does the fact that it's very, very small compared with the space available, make it less "there"? intuititvely, it's hard to map to concepts on earth. for instance, if there was some poop on my ballroom floor, even if it was a small amount of poop, and the ballroom floor was very large, I would want to clean it. but the orders of magnitude are larger in the space example. so do we forget about it? maybe it's like how there are gross insects eating our eyelashes all the time, but they are so small we don't care.

*Demodex brevis* length is 0.4 mm long vs human height 2m

so 4 x 10^(-3)m vs 2 x 10^0 m, so 3 orders of magnitude.

e.g. bacteria, 2 micrometers = 2 x 10^(-6)m vs 2 x 10^0 m, so 6 orders of magnitude.

e.g. atom, 0.1 nm, or 1 x 10^(-10)m, so 10 orders of magnitude.

Bag of human feces from Apollo astronauts is perhaps 10cm diameter, vs 384,000 km, a difference of

1 x 10^(-1)m vs 3.84 x 10^8m, so 9 orders of magnitude. And if we make it heliocentric, that's 150m km, which is another 3 order of magnitude, so 12 orders.