“The city [Ephesus] was filled with confusion, and the people rushed with one accord into the theater, seizing Gaius and Aristarchus, the Macedonians, Paul’s traveling companions.” ―Acts 19:29 ...

From the heliocentric theory to rocket science, these visionaries challenged conventions and reshaped the future.

Whenever I want to refresh my lunar observing, to see the Moon in new and uncommon ways, I wait for its phase to wane and point my telescope to the lunar terminator — that bleak and shadowy domain ...

When asked who was the first to propose the heliocentric theory—that is, the one in which the Sun is the center of the universe and the planets revolve around it—the usual answer is Copernicus.

ARISTARCHUS, who flourished in the first half of the third century B.C., is chiefly known as the only philosopher or astronomer of antiquity who taught that the earth moves, round the sun. This ...

Aristarchus of Samos, the ancient Copernicus; a history of Greek astonomy to Aristarchus, together with Aristarchus's Treatise on the sizes and distances of the sun and moon, a new Greek text with ...

As the moon waxes toward full this weekend, the advancing line of lunar sunrise will expose one of our satellite's most brilliant characters tonight: Aristarchus. Here's how to see it. Read post here.