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The Ancient Egyptians were meticulous astronomers and recorded the passage of the heavens in extraordinary detail. The goal was to mark the passage of time and to understand the will of the Gods who ...

There is a group of variable pairs of stars known as Algol-type binaries. They are named after the prototype member of this class: Algol, a bright multiple star system in the Perseus constellation. In ...

This week, skywatchers will have the chance to catch a winking "demon star" in the night sky. The star, known as Algol, is located in the constellation of Perseus, the Hero, and has been known since ...