Astronomy is a fairly early technology in Civilization games.

Civ4Edit

Main article: Astronomy (Civ4)

Cost: 2000

Era: Renaissance

Prereqs: Calendar, Optics

Allows:

• Galleon (East Indiaman), Frigate, Privateer, Ship of the Line
• Observatory (Salon)

Others:

• Enables trade on ocean
• Obsoletes Obelisk, Monument, Stonehenge, Colossus

Civ5Edit

Cost: 680

Era: Renaissance

Prereqs: Compass, Education

Leads To: Navigation

Allows:

• Caravel

• Observatory

Others:

• Faster Embarking, Deep Water Embarkment

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