Other winners include Richard Murray, whose image of a snail beneath The Plough asterism won in the Life At Night category.
Murray, from Waterlooville, Hampshire, said: “The shot took a lot of patience and a surprising amount of suspense, waiting for the exact moment when my tiny, mucus-powered model lifted both antennae toward the cosmos above.
“Eventually, the stars, the snail, and the timing all lined up and I got the shot I’d been hoping for.”
Judge Elinor Newman, who organises the national park’s Dark Skies Festival which runs until February 22, said: “This really does encapsulate life at night, with the snail, flora and lichen.
“The image has incredible detail, captures a moment and takes me to another place. A very inspiring image.”
More winners can be found on the South Downs National Park Authority website.