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APOD: 2026 October 28 – The Mutual Occultation of Ganymede and Io
scover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. Michael Wong The Mutual Occultation of Ganymede and Io Explanation: Jupiter is one of the least lonely planets in the Solar System, at least when it comes to natural satellites.
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