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Algol

A favored naked eye variable star. Every a few days there are a few hours when it is slightly, but obviously dimmer. No telescope or binoculars is needed. Check skypub or AAAP calendar for predictions.

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All images by Jerry Xiaojin Zhu unless noted otherwise. Feel free to use them for your personal enjoyment. For other usage please contact the author at jerryzhu@gmail.com