Lost notes reveal Galileo closely studied the ancient Greek astronomer Ptolemy, offering fresh insight into his early scientific thinking.

At SLAC National Accelerator Laboratory in Menlo Park on Wednesday morning, researchers focused a powerful X-ray machine on pages of parchment from a medieval desert monastery, looking to reveal ...

Ancient Greek astronomers made important observations regarding the night sky long before the first telescope was invented in the 1600s. These pioneering astronomers relied on naked-eye observations ...

Before telescopes, ancient Greek astronomers relied on naked-eye observations of the night sky to understand the universe around them. The meticulous star catalog belonging to one of the best of these ...

Scientists are using X-ray imaging to recover erased astronomical text, hoping to find fragments from Hipparchus’s star catalogue. Courtesy Jacqueline Ramseyer Orrell/SLAC National Accelerator ...