Discover stars on the night sky, and mark them on their constellations. Each constellation has special boons that could serve useful for you during your journey through the stars.
Be the one who discovers the last star of a constellation and collect them to gain special abilities. Constellations have four types, and specializing in collecting the same type can grant you more fame at the end of the game.
Manage your resources and take a break. During the rest action you don’t mark stars, but refill your pouch with stardust, which you will need for stargazing in the coming turns.