Andromeda Constellation

CONSTELLATION ANDROMEDA

CELESTIAL PRINCESS & THE GREAT SPIRAL GALAXY

STELLAR CARTOGRAPHY:

The Chained Princess

Positioned prominently in the northern sky, Andromeda is one of Ptolemy's original 48 ancient constellations. Best viewed during autumn evenings, it hosts a collection of brilliant framework stars and serves as the celestial address for the magnificent Andromeda Galaxy (M31).

PRIMARY DEEP-SKY OBJECT

M31 GALAXY

Located ~2.5 million light-years away; the most distant object visible to the naked eye.

CONSTELLATION SIZE

722 SQ. DEG.

Ranked as the 19th largest constellation in the night sky by area.

Andromeda Sync

M31 Galactic Mapping. Analyzing the 2.5 million light-year trajectory of our nearest spiral neighbor. New Horizons monitors the Blueshift Constant to track the upcoming Milky Way merger.

🌌 Type: SBb Spiral Galaxy.
🚀 Velocity: 110 km/s Blueshift.
✨ Stars: 1 Trillion Stellar Bodies.

Horizons GALAXY SYNC

🌀

DISTANCE

2.5M LY

APPROACH SYNC ACTIVE

INTERGALACTIC DRIFT STABLE

Maiden Sync

Mythic Geometry Mapping. Analyzing the 48-constellation Ptolemaic constant. New Horizons monitors the Celestial Latitude to track the Princess's position near Pegasus and Cassiopeia.

⛓️ Legacy: The Chained Maiden of Aethiopia.
📜 History: Original Almagest Entry (Ptolemy).
⚔️ Neighbor: Perseus Rescue Vector.

Horizons MYTHOS SYNC

👸

STATUS

CHAINED

PTOLEMAIC GRID ACTIVE

CONSTELLATION BOUNDARY SECURE

Stellar Sync

Luminosity Chain Mapping. Analyzing the spectral signatures of the primary Alpha, Beta, and Gamma vectors. New Horizons monitors the Magnitude Variable to track the distinct stellar line.

🌟 Alpheratz: Brightest Blue-White Node.
🔴 Mirach: Cool Red Giant Core.
✨ Almach: Triple-Star Binary Sync.

Horizons STELLAR SYNC

✨

SYNC STATE

LUMINOUS

STELLAR CHAIN ACTIVE

SPECTRAL BUFFER STABLE

Finder Sync

Celestial Navigation Mapping. Analyzing the "V" branching vector from the Great Square of Pegasus. New Horizons monitors the Sky Clarity Index to track the M31 "Smudge" visibility.

⬛ Anchor: The Great Square of Pegasus.
📐 Geometry: Large "V" Shape Branching.
🔍 Target: M31 Smudge Near Mirach.

Horizons NAVIGATION SYNC

🔭

SKY STATE

VISIBLE

M31 VECTOR DETECTED

PEGASUS SQUARE LOCKED

Legacy of the Chained Maiden 📜

✨

ANCIENT GREECE | THE MYTH

Andromeda was a princess of Ethiopia, chained to a rock to appease a sea monster. She was rescued by Perseus, who saw her beauty from the sky and saved her life.

964 AD | "LITTLE CLOUD"

Persian astronomer Al-Sufi was the first to describe a "smear of light" in the constellation. This was the first recorded observation of our neighboring galaxy.

1924 | THE GREAT DEBATE

Edwin Hubble proved that the "nebula" in Andromeda was actually a separate galaxy millions of light-years away, proving the universe is far larger than we thought.

"Did you know? The Andromeda Galaxy is the most distant object you can see with the naked eye—it contains roughly one trillion stars!"

ALPHA ANDROMEDAE

Also known as **Alpheratz**, this star is shared with the constellation Pegasus, forming the "Great Square" asterism. It marks Andromeda's head.

STAR DATA

Magnitude: 2.06

M31 GALAXY

Located roughly **2.5 million light-years** away, it is the most distant object visible to the naked eye under dark skies. It is currently on a collision course with our galaxy.

DEEP SKY INFO

Type: Spiral ($Sb$)

LOCATION GUIDE

Best viewed in the Northern Hemisphere during Autumn. Look for the "V" shape of stars connected to the Great Square of Pegasus.

IAU BOUNDARIES

Season: Fall / Autumn

Mythological View

Artistic representation of the 'Chained Maiden' as described in Greek mythology.

Stellar Alignment

The V-shaped pattern branching out from Alpheratz, shared with Pegasus.

Observational Map

Detailed map identifying the location of M31, the Andromeda Galaxy.

Andromeda Constellation • Bright Stars

The Chained Maiden • Main Stars Ranked by Apparent Magnitude

Andromeda is a large northern constellation famous for hosting the Andromeda Galaxy (M31). Its brightest stars form a long chain stretching from the Great Square of Pegasus.

Star	Spectral Type	Notes
Alpheratz α And Alpha Andromedae • Sirrah	B9 p	Blue-white • Part of Great Square of Pegasus
Mirach β And Beta Andromedae	M0 III	Red giant • Gateway to M31
Almach γ And Gamma Andromedae	K3 II	Beautiful multiple star system
δ Andromedae δ And Delta Andromedae	K3 III	Orange giant • Spectroscopic binary
Nembus 51 And 51 Andromedae	K3 III	Orange giant
ο Andromedae ο And Omicron Andromedae	B6 p	Blue • Multiple system • Variable
λ Andromedae λ And Lambda Andromedae	G8 III-IV	Yellow giant • RS CVn variable
μ Andromedae μ And Mu Andromedae	A5 V	White main-sequence
ζ Andromedae ζ And Zeta Andromedae	K1 II	Orange giant • Eclipsing binary
Titawin υ And Upsilon Andromedae	F8 V	Has multiple exoplanets
κ Andromedae κ And Kappa Andromedae	B9 IV	Blue-white • Has a planetary companion
φ Andromedae φ And Phi Andromedae	B7	Blue • Double star

Observing Guide

Best months to view
Andromeda

The Andromeda constellation and its famous galaxy (M31) shine brightest in the autumn and early winter sky. From mid-northern latitudes, it rises high overhead during convenient evening hours — making September through December the prime window. October offers the absolute peak: high altitude, crisp air, and early evening visibility.

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