Celestial hide and seek

An occultation is the phenomenon where one celestial body passes in front of another to hide it – like a kind of cosmic hide-and-seek. The most common event is the passage of the Moon in front of bright stars. The Occultation Section makes timings of these to help monitor the Moon’s position in space.

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The reappearance of the bright star Aldebaran from an occultation on the 6th November, 2017