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 ...

What a wonderful question! The simple answer is that they relied on centuries of previous observations. Remember, even computers have to be programmed with the right data to produce future times of ...

Since the 1990s, astronomers have found a handful of other dwarf planets in the belt, such as Eris and Sedna, along with ...

Long before modern astronomy, the Assyrians were already observing the night sky. In this video, we explore an ancient ...

The New Crescent Society, which is organizing the Greenwich event with the Royal Observatory, is hoping moon sighting will become fully established in Britain and be used by mosques.

As next-generation telescopes map this outer frontier, astronomers are bracing for discoveries that could reveal hidden planets, strange structures, and clues to the solar system’s chaotic youth.

Researchers are using an instrument at the SLAC National Accelerator Laboratory to uncover the original text of reused parchments. Jacqueline Ramseyer Orrell / SLAC National Accelerator Laboratory A ...

Six planets are linking up in the sky at the end of February, and most will be visible to the naked eye. It's what's known as ...

At first blush, the structures in New Mexico built by the Chacoan people and those in Ohio traced to the Hopewell culture bear little resemblance. The Chacoans, accommodating the arid desert of their ...

Astronomers have made a surprising discovery: a faint object nearly invisible is holding a collection of star clusters ...