Image: NASA

Exploring the Night Sky

The star Algol, which is located in the Perseus constellation, is also known as the Demon Star. Data from NASA's Transiting Exoplanet Survey Satellite has shown the regular dimming of this star. Algol changes its brightness every three days. This change happens because it is a triple-star system. In this system, two of the stars eclipse each other.

Rewritten with AI from facts reported by NASA. Read the original for the full report.

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