The Antikythera Mechanism

The Antikythera Mechanism 21 centuries ago, a mechanism of fabulous ingenuity was created in Greece, a device capable of indicating exactly how the sky would look for decades to come, including Eclipses. Eclipses go on an 18 year cycle called the Saros cycle. They have been accurately predicted long before the heliocentric model was developed in the 16th century. Source: Lord Of War