More like Orbit 21

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The Science Fiction Hall of FameSeries
series11 books1895
Science fiction.
“The greatest science fiction stories of all time chosen by the members of the Science Fiction Writers of America.”
from the catalogue
Start with The Science Fiction Hall of Fame, Volume One →
RamaUniverse
universe7 books1973
Set in spaceship.
“Something is falling through the solar system on a hyperbolic orbit, and it is not a comet.”
from the catalogue
Start with Rendezvous with Rama →
includes Rama (2)
HeecheeSeries
series19 books1972
completed
Space opera, set in far future and other star systems.
“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 →
Known SpaceUniverse
universe142 books1964
Set in far future and other star systems.
“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
ThistledownSeries
series5 books1978
completed
Hard science fiction, set in far future.
Start with The Wind from a Burning Woman →
Blindsight / FirefallSeries
series3 books2006
Hard science fiction and first contact, tense in tone, about artificial intelligence.
Start with Blindsight →