Twilight Arch
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In the deepening twilight, Mercury (near the horizon) and Comet Hale-Bopp appear with a sprinkling of western stars under the Keyhole Arch at Monument Rocks National Natural Landmark.
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In the deepening twilight, Mercury (near the horizon) and Comet Hale-Bopp appear with a sprinkling of western stars under the Keyhole Arch at Monument Rocks National Natural Landmark.
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