De facto name — The Andromeda Nebula: Episode I. Prisoners of the Iron Star.
Andromeda | The Andromeda Strain | Andromeda Galaxy | Nebula | Andromeda (TV series) | The Andromeda Strain (film) | Andromeda polifolia | nebula | Gene Roddenberry's Andromeda | Crab Nebula | Cat's Eye Nebula | Andromeda (mythology) | planetary nebula | Nebula Science Fiction | Nebula (band) | Nebula Award for Best Novella | Gum Nebula | Andromeda Gardens | Andromeda (constellation) | Perseus and Andromeda | Nebula Records | Nebula Award for Best Novelette | Homunculus Nebula | Detail of Peiresc's notes recording his first observation of the Orion Nebula | Carina Nebula | Boomerang Nebula | Artist's conception of OGLE-TR-10b with Lagoon Nebula | Andromeda galaxy |
The Andromeda Galaxy, for instance, was referred to as the Andromeda Nebula (and spiral galaxies in general as "spiral nebulae") before the true nature of galaxies was confirmed in the early 20th century by Vesto Slipher, Edwin Hubble and others.