Scenes from at Sea
Starry night over the South Atlantic
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What happens when you attempt to shoot stars from a moving ship in the South Atlantic ocean (somewhere between the Falklands and Argentina)? No, it's not a "blurry" photo. Rather, you record the repetitive motion of the ship as it rides the waves (while the ship itself remains sharp). Above, Orion and the faint Milky Way stand out in a 4 minute exposure from the bow of the ship (the darkest part).

Below, a real star trail attempt shows, if you look closely, a seismograph-like back-and-forth motion of the stars. The jagged trail near the end of each was the ship changing direction before I could end the 30-minute exposure.