As far as I can recall, last night's dream centered around
A: a discussion of whether or not metal-poor worlds could be habitable, and
B: a discussion of what you can do with radar with a power plant scaled to powered an interstellar rocket.
I think the second one might have been influenced by Mote in God's Eye, where if you run the numbers on the amount of power the MacArthur generates, the only way the ship would have to power down most subsystems to send a message is if the ship's lasers were carving the messages on the surfaces of distant planets.
Also posted at Dreamwidth, where there are comment(s); comment here or there.
- So nerdy