The long-tailed CometSWAN was only discovered in April this year but has already caused an exciting commotion among amateur astronomers. Discovered by Michael Mattiazzo from Australia, C/2020 F8 (SWAN) passed Earth on May 13 but could remain within sights going into June. As the chunk of ice, rock and dust is blasted by sunlight, it creates a thin atmosphere or coma that glows.