Stonehenges
A plethora of Stonehenges
Observatories, like so much of astronomy, are truly ancient features of human culture; retracing the steps of the first person
Who built the first observatory? Read More »
Maps of the stars are nearly as ancient as human culture itself; inscriptions describing the positions of stars and constellations
Who made the first map of the universe? Read More »
Earth’s circumference was first accurately measured more than 2,000 years ago by the Greek astronomer Eratosthenes, who at the time
How was the size of Earth first measured? Read More »