Sirius Sector

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In Isaac Asimov's Galactic Empire, the Sirius sector was one of the Empire's important administrative divisions. It included many planets advanced by some late Galactic Era archaeologists as the planet of origin for the human species.

Systems in the Sirius sector:

  • Alpha: The Alpha or Alpha Centauri system, advanced on occasion as the location of human origins. It was probably uninhabited and largely forgotten by the rest of the Empire through most of its history.
  • Arcturus: The capital of the Sirius Sector at one point, and later of the Arcturus sector. It was also advanced (most notably by a scholar named Lameth) as the location of human origins.
  • Aurora: The most dominant of the Spacer worlds, and the first one settled. It was the second oldest inhabited planet in the galaxy after Earth, and its primary was in fact Tau Ceti. All of the Spacer worlds were largely abandoned and forgotten through the course of galactic history.
  • Comporellon: Apparently largely ignored in galactic history, Comporellon was a cold world, and the oldest not settled by the Spacers. One of its greatest points of national pride was its myths of ancientness. Its primary was Epsilon Eridani.
  • Fomalhaut: About 25 light years from Earth. Its inhabitants spoke a dialect of Galactic standard speech very different from the standard.
  • Hesperos: A Spacer planet.
  • Melpomenia: A Spacer planet.
  • Nephelos: One of the planets conquered by Tyrann.
  • Nexon: A spacer planet 2 parsecs from Solaria.
  • Rhodia: One of the planets conquered by Tyrann.
  • Sirius: The capital system, and one that was advanced as the location of human origins. Between 800-900 G.E., a planet in the Sirius System was one of the ten most populated planets in the Galaxy.
  • Smitheus: A Spacer planet.
  • Solaria: The last Spacer world to be settled.
  • Tyrann: A powerful system during the early stages of exploration, it lay about 150 parsecs (500 light years) from Earth. It was afflicted with global water dearth.


Major and minor planets featured in Isaac Asimov's Foundation series

Anacreon | Aurora | Baley's World (Comporellon) | Earth | Gaia | Helicon | Kalgan | Korell | Delicass (Neotrantor) | Sayshell | Solaria | Siwenna | Tazenda | Terminus | Trantor (Hame)


Administrative divisions of the Galactic Empire

Anacreon Province | Ifni Sector | Langano Sector | Sayshell Sector | Sirius Sector | Trantor Sector | Vega Province
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