Encyclopedia Galactica first appeared in Isaac Asimov's short story "Foundation" (Astounding Science Fiction, May 1942), later republished as "The Encyclopedists" in the short-story collection Foundation (1951).
Ensiklopedia Galaktika mula-mula muncul dalam cerita pendek Isaac Asimov "Foundation" (Astounding Science Fiction, Mei 1942), kemudian diterbitkan lagi dengan judul "The Encyclopedists" dalam kumpulan cerita pendek Foundation (1951).