An observer is one who engages in observation or in watching an experiment.

Observer may also refer to:

Fiction

  • Observer (novel), a 2023 science fiction novel by Robert Lanza and Nancy Kress
  • Observer (video game), a cyberpunk horror video game
  • Observer (Mystery Science Theater 3000), a fictional television character
  • Observers, beings in the television show Fringe

Music

  • "Observer", a song by Gary Numan on his album The Pleasure Principle
  • "The Observer", a track from The Flaming Lips' 1999 album The Soft Bulletin
  • The Observers, an alternative name for reggae session band Soul Syndicate

Publications

  • Observer, online successor to The New York Observer
  • The Observer, a UK Sunday newspaper & magazine
  • The Observer (disambiguation), multiple publications including newspapers, magazines & fiction
  • The APS Observer, a member magazine of the Association for Psychological Science (APS)

Science and technology

  • Observer (general relativity)
  • Observer (quantum physics)
  • Observer (special relativity)
  • Observer (meteorological)
  • Observer pattern, a design pattern used in computer programming
  • State observer in control theory, a system that models a real system in order to provide an estimate of its internal state

Other uses

  • Observer status in an organization
  • The Observer type in the Enneagram of Personality model
  • Air observer, an aircrew member whose duties are predominantly reconnaissance, commonly used in the World War I era
  • Donald Alaster Macdonald (1859–1932), Australian journalist who wrote under the pseudonym 'Observer'

See also

  • Observer effect (disambiguation)
  • National Observer (disambiguation), a variety of publications
  • The Observer (disambiguation)
  • United Nations Military Observer