Chapter Ⅰ

The Royal Family of the Sky

One vain sentence spoken by a queen produced six constellations — the largest single story in the heavens, all placed side-by-side so the drama replays every autumn night.

Cassiopeia — the Boastful Queen

“I am more beautiful than the Nereids.”

Queen of Aethiopia, wife of King Cepheus. Her boast insulted the fifty sea-nymphs — and their protector Poseidon, who sent the sea-monster Cetus to ravage the coast. The oracle's price for relief: sacrifice her daughter.

Her punishment is written in the sky's rotation: chained to her throne, she circles the pole forever — spending half of every night hanging upside down, an eternal lesson in humility.

In the sky: the bright W/M zigzag opposite the Big Dipper across Polaris. Circumpolar — visible every clear night of the year from northern latitudes.

Andromeda — the Chained Princess

The innocent paying for her mother's pride.

Chained to a rock at the sea's edge as an offering to Cetus. The engraving shows exactly what the Greeks saw in these stars: a young woman with arms stretched to two chains of stars flowing from the Great Square.

Just as the monster surfaced, a hero happened to fly past — carrying a severed head in a bag.

In the sky: home of M31, the Andromeda Galaxy — 2.5 million light-years away, the most distant object your naked eye can see. It hovers just above the princess's knee.

Perseus — the Hero

Fresh from beheading Medusa, the Gorgon whose gaze turned men to stone.

Perseus showed Cetus the head of Medusa — the monster turned to stone and shattered into the sea. He married Andromeda on the spot; the wedding party (minus one petrified rival suitor) lived happily.

The chart draws him mid-stride, sword high, Medusa's head dangling from his left hand. The star marking the Gorgon's eye is Algol — from Arabic ra's al-ghūl, “the demon's head”. Uncannily, Algol really does “blink”: an eclipsing binary that dims visibly every 2.87 days. The ancients marked the sky's most sinister star with a monster's eye.

In the sky: between Cassiopeia and the Pleiades. August's famous Perseid meteor shower rains out of this constellation.

Pegasus — the Winged Horse

Born from Medusa's blood as it struck the sea-foam.

When Perseus cut off Medusa's head, the winged horse sprang from her neck — the monster's death giving birth to something beautiful. Pegasus later carried the hero Bellerophon against the Chimera, until Bellerophon arrogantly tried to fly to Olympus and was thrown; the horse completed the journey alone and joined the gods.

Note the drawing: only the front half of a horse, flying upside-down relative to northern viewers — the Greeks drew a half-horse emerging from the celestial sea.

In the sky: the Great Square — four stars framing an eerily empty box, autumn's landmark. One corner star, Alpheratz, is shared with Andromeda: mother-in-law and horse permanently joined.