More like Alien Artifacts

anchored on:science fictionfar futurespace operaspaceother star systems

but

Narrow

CoDominiumUniverse
universe98 books1971
Military science fiction.
“The body of work runs along a few hard threads rather than one line.”
from the catalogue
Start with The Mote in God's Eye →
includes Moties, Falkenberg's Legion, Laurie Jo Hansen, War World
Known SpaceUniverse
universe142 books1964
Science fiction, about aliens, set in far future and space.
“Give a clever species a few centuries and a working fusion drive, and it will fill the sky with problems.”
from the catalogue
Start with Ringworld →
includes Ringworld, Fleet of Worlds, Man-Kzin Wars
UpliftUniverse
universe13 books1980
About uplift.
“No species, the Galactics insist, ever climbs to sapience alone.”
from the catalogue
Start with Sundiver →
includes Uplift, Uplift Storm
HeecheeSeries
series19 books1972
completed
Science fiction and space opera, about space exploration and aliens, set in far future and space.
“The Heechee are an advanced alien race that visited the Solar System hundreds of millennia ago and then mysteriously disappeared.”
from the catalogue
Start with Gateway →
ThistledownSeries
series5 books1978
completed
Hard science fiction.
Start with The Wind from a Burning Woman →
Space BeagleSeries
series5 books1939
completed
Set in spaceship.
Start with Black Destroyer →