In a monastery library on the Sinai Peninsula, a devotional handbook by the monk John Climacus sat quietly for centuries ...

What is the baseline for determining the magnitude scale of celestial objects? Why do brighter objects have negative numbers? Dean Treadway Knoxville, Tennessee The first observer to catalog ...

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 ...

Surrounded by metal pipes and tangles of cables, two researchers point to bright orange squiggles on a computer screen. The squiggles are a poem written in ancient Greek about heavenly phenomena, seen ...