My 4e Star Pact Warlock was astrology / astronomy -themed, not an insane Far Realms devotee. From my notes and off the top of my head:
- Leo the Lion is, in one culture, Leonard the Farmer. He carries a sickle in one hand and guides a plow in the other. When the plow rises at dawn it is time to sow the seeds for a crop. When the sickle sets at dusk it is time to reap.
- Four constellations could be Father, Mother, Daughter, Son -or- King, Queen, Prince, Princess.
- One star is the most malefic sign of portending DOOM. It might be the Disintegrate eye-ray of the Beholder.
- Every culture names the constellation we know as Orion after their mythic hero-founder character.
- Argo the great Ship, which explores new lands, crosses over the horizon, "boldly goes where no man has gone before." After a great cataclysm when the gods came down to walk the earth, the stars of Argo twisted in the sky and became the Shipwreck.
- The stars of the Peacock are visibly different colors - blue, red, yellow, orange, white. The stars of the nearby Cockatrice all look dull gray, like rock.
- One constellation is called the Triangle by barbarian cultures, the T-Square by those cultures who build monument buildings, and the Geometer by Wizard enclaves and other learned bodies, because faint stars nearby form squares and demonstrate the equation a^2 + b^2 = c^2.
- If you understand how to read the signs in the area of the sky called The Sea (several bordering constellations have something to do with sea creatures), you can find Atlantis!