ATHENS, Greece — When you’re trying to fathom a mangled relic of very old hi-tech, it helps to have the manufacturer’s instructions. For more than a century since its discovery in an ancient ...

The star catalog was made by ancient Greek astronomer Hipparchus around 162 and 127 BCE, 1,400 years before the telescope. Get the Popular Science daily newsletter💡 Email address Sign up Thank you!

Written with expertise and great enthusiasm, this unique book offers a historical and philatelic survey of astronomy and some related topics on space exploration. It contains more than 1300 color ...

In the case of one poem, written over 2,500 years ago by the Greek poet Sappho, scientists think they can pinpoint the time to early spring somewhere in ancient Greece.

An ancient book on astronomy from the 1500s sold for more than £10,000 ($12,200), as a "private international buyer" triumphed over intense competition at a U.K. auction.