[ezmpildy] Intragalactic versus intergalactic

The distance between galaxies seems not that much greater than the size of galaxies.  Milky Way diameter 100,000 l

[gzhcqvfb] Black hole jet as Death Star superlaser

Black holes emit jets (through an as yet poorly understood mechanism) as seen in active galactic nuclei, e.g. Hercules

[bgyjrlrh] K3 villages are not very important

In a Star Wars-like universe in which planet-killing weapons are being frequently used, at first it doesn't seem so bad

[drdwhngj] If meteors were far away

It's probably not too difficult to use parallax to determine that meteors are atmospheric phenomena (actually to verify

[yaomwkup] Just the right amount of water

It's a weird coincidence that we not only have water on earth (hypothesized to have been delivered by many comet impact