I finally decided that the Astral Sea needed a map. One of the player characters decided to pursue his quest to revive Arden, the dead elven god. His corpse is being drained of its remaining life force by the sorcerer queen of the gray elves (Githyanki). His corpse is also drifting in the Astral Sea. A gate was found (a bottomless pit in the Barrowmaze), a ship was gained (pictured on the right), and now the party is sailing the Astral Sea Spelljammer style and finding places in the Planescape fashion.
Anyway, I was wondering how many random encounters I should be rolling for any trips from A to B. I should draw a map, I thought. I remembered my Traveller Subsector Mapper. All I had to do was to generate an UWP for my locations.
Tu Akhra 0404 D0602B3-1 P As De Lo Lt R Susrael 0503 B0604A4-1 N As De Lt NI A Nova Genova 0607 B867686-1 N Ag Ga Lt NI Ri Hinia Oot 0705 E060200-1 As De Lo Lt A
I basically ignored the requirement for an atmosphere of 0 to generate the asteroid trade code. All these worlds have breathable air. Plugging this into the mapper: