More like Planetary

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Cities in FlightSeries
series10 books1950
completed
Space opera.
“The stories cover roughly two thousand years, from the very near future to the end of the universe.”
from the catalogue
Start with They Shall Have Stars →
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
HeecheeSeries
series19 books1972
completed
Space opera.
“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 →
UpliftUniverse
universe13 books1980
Space opera, about uplift.
“No species, the Galactics insist, ever climbs to sapience alone.”
from the catalogue
Start with Sundiver →
includes Uplift, Uplift Storm
Academy / Priscilla (Hutch) HutchinsSeries
series16 books1983
Science fiction, about space exploration and aliens, set in far future and space.
“Beginning with The Engines of God, the series treats deep time and the near-total absence of intelligent alien life as its central mystery, favoring slow-burn discovery over action.”
from the catalogue
Start with The Engines of God →
State / Leshy CircuitSeries
series9 books1969
Science fiction, set in far future and other star systems.
Start with Passerby →