This movie shows comet SWAN (circled) moving across the sky from Aug. 25 to Oct. 2, 2025. The movie was made by combining images from NASA’s PUNCH (Polarimeter to Unify the Corona and Heliosphere) mission that were not fully processed. Seams between individual images appear as black lines across the view. Bright objects have white spikes extending from them. Fainter stars and cosmic rays flicker in the background. The two bright objects the comet passes between (about halfway through the video) are the planet Mars (top) and the star Spica (bottom).

This movie shows comet SWAN (circled) moving across the sky from Aug. 25 to Oct. 2, 2025. The movie was made by combining images from NASA’s PUNCH (Polarimeter to Unify the Corona and Heliosphere) mission that were not fully processed. Seams between individual images appear as black lines across the view. Bright objects have white spikes extending from them. Fainter stars and cosmic rays flicker in the background. The two bright objects the comet passes between (about halfway through the video) are the planet Mars (top) and the star Spica (bottom).