Star lore
Andromeda
Direct answer
Andromeda is an official northern constellation between Pegasus, Cassiopeia, Perseus, and Pisces; it contains the Andromeda Galaxy, M31.
Andromeda is a northern constellation best known as the sky region containing M31.
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At a glance
- Found in
- Constellations & Star Lore
- Related
- Antlia, Apus, Constellation, Asterism
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The story behind Andromeda
Andromeda was among the 48 constellations catalogued by Ptolemy and retains its ancient name in the modern IAU system.
A one-minute story
The Road of the Sun
Where the twelve signs came from, and why they carry the names they do.
Why Andromeda matters
Andromeda’s chain of stars extends from the Great Square of Pegasus toward one of the nearest large galaxies to the Milky Way.
Andromeda in practice: an example
Mirach helps observers step from the visible star chain toward the faint naked-eye glow of M31 under dark skies.
Where readings of Andromeda go wrong
The constellation is a bounded direction on the sky; its stars and M31 are not one physical group.
Sources and editorial method
Research references used for this entry include:
- International Astronomical Union: The Constellations - Official names, abbreviations, and boundaries for the 88 modern constellations.
- NASA Space Place: What Are Constellations? - NASA introduction to constellation regions, patterns, visibility, and seasonal sky changes.
- Source
- The Great Almanac Dictionary
- Category
- Constellations & Star Lore
- Last updated
- 2026-09-26
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Common questions
What is Andromeda?
Andromeda is an official northern constellation between Pegasus, Cassiopeia, Perseus, and Pisces; it contains the Andromeda Galaxy, M31.
What do people get wrong about Andromeda?
The constellation is a bounded direction on the sky; its stars and M31 are not one physical group.
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