Re:Seven earth-sized planets discovered circling a star 39 l...
by madarco on Thursday February 23, 2017 @04:51AM
(#13712755)
It reminds me of Land and Overland by Bob Shaw:
"The setting for the trilogy is a pair of planets, Land and Overland, which orbit about a common centre of gravity, close enough to each other that they share a common atmosphere."
They don't share a common atmosphere, but I guess the delta required for interplanetary transfer is really low.
"The setting for the trilogy is a pair of planets, Land and Overland, which orbit about a common centre of gravity, close enough to each other that they share a common atmosphere."
They don't share a common atmosphere, but I guess the delta required for interplanetary transfer is really low.