Opus 200
book by Isaac Asimov
Opus 200 is Isaac Asimov's joint two-hundredth book, along with his autobiography In Memory Yet Green (both books were published on the same day, following his 199th book). It was published by Houghton Mifflin in March 1979. Asimov chose to celebrate the publication of his two hundredth book by writing about his previous 198 books, including excerpts from short stories and novels, as well as nonfiction articles and books. Opus 200 also includes three complete science fiction stories, two complete mystery stories and two complete essays.
Contents
Introduction
Part 1 - Astronomy
Excerpt from The Gods Themselves
Excerpt from ABCs of Space
Excerpt from How Did We Find Out About Comets?
Excerpt from Comets and Meteors
Excerpt from Alpha Centauri, the Nearest Star
Excerpt from The Collapsing Universe
Part 2 - Robots
"The Bicentennial Man"
Part 3 - Mathematics
Excerpt from How Did We Find Out About Numbers?
Excerpt from "Skewered!"
Part 4 - Physics
Excerpt from Light
Excerpt from Please Explain
Excerpt from Worlds Within Worlds
Part 5 - Chemistry
"Good Taste"
Part 6 - Biology
Excerpt from How Did We Find Out About Germs?
This brief starts where responsible research should: with the source description of “Opus 200” as book by Isaac Asimov. Everything that follows is an evidence route, not borrowed authority.
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Attribution, date and provenance are strongest when supported by the original work, a catalogue record and documented transmission. The source revision retrieved here is dated Mar 15, 2026. The linked authority identifier is Q17013085. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1979.
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