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. Isaac Asimov (courtesy of Jay Kay Klein) Isaac Asimov (c. ... In Isaac Asimovs Robot/Empire/Foundation series of novels, the Galactic Empire is an empire consisting of planets settled by humans across the whole galaxy. ... Importance and applicability Most of human history is not described by any written records. ...

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 planet in the galaxy after Earth, and 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.
• Fomalhaut: About 25 lightyears 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 an 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, and the first to die.
• Tyrann: A powerful system during the early stages of exploration, it lay about 150 parsecs (500 lightyears) from Earth. It was afflicted with global water dearth.

In Asimovs Foundation Series, Alpha is a star system--apparently Alpha Centauri__cited by Lord Dorwin as one of those where humankind potentially originated. ... In Isaac Asimovs Foundation Series, Arcturus is one of the major planets. ... Aurora is a fictional planet in Isaac Asimovs Robot Series. ... In Isaac Asimovs Foundation/Empire/Robot series, the Spacers were the first humans to emigrate to space. ... Tau Ceti (Ï„ Cet / Ï„ Ceti) is a star commonly mentioned by science fiction authors since it is similar to the Sun in mass and spectral type in addition to being relatively close to us. ... Comporellon is a planet in Isaac Asimovs Foundation Series. ... Light year, a measure of distant Lightyear (band), a ska-punk band from the UK Buzz Lightyear, a character in the animated film Toy Story. ... Tyrann is a planet in The Stars, Like Dust by Isaac Asimov. ... The parsec (symbol pc) is a unit of length used in astronomy. ... Solaria was a fictional human-inhabited planet in Isaac Asimovs Foundation and Robot series. ... Rhodia is a planet in The Stars, Like Dust by Isaac Asimov. ... Solaria was a fictional human-inhabited planet in Isaac Asimovs Foundation and Robot series. ... Tyrann is a planet in The Stars, Like Dust by Isaac Asimov. ... The parsec (symbol pc) is a unit of length used in astronomy. ... Light year, a measure of distant Lightyear (band), a ska-punk band from the UK Buzz Lightyear, a character in the animated film Toy Story. ...