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  • Rachmaninoff Crater: Mercury's Mysterious Opposite of Caloris Basin
    Yes. Mercury's Caloris Basin, one of the largest impact craters in the solar system, has a mysterious "bullseye" feature called the Rachmaninoff crater directly opposite it on the planet's surface.

    Rachmaninoff crater

    - Almost directly opposite Caloris Basin on the other side of the planet

    - Diameter of about 300 kilometers

    - Surrounded by concentric rings

    - Thought to be formed by ejecta from the Caloris impact

    - Unique feature on Mercury

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