Comet expert Michael Mattiazzo captured this image of the new comet R2 SWAN this past week using a 200mm lens. Note the circle around a faint object at upper right. That’s the interstellar comet 3I/ATLAS! Used with permission.If you like Comet SWAN, you’ll love Comet Lemmon, which is forecast to become even brighter than SWAN! Read about Comet Lemmon here. And don’t forget about our interstellar comet, 3I/ATLAS. October 2025 is a great month for comets! | EarthSky
Kelly Kizer Whitt - EarthSky’s nature and travel vlogger on YouTube - writes and edits some of the most fascinating stories at EarthSky.org. She's been writing about science, with a focus on astronomy, for decades. She began her career at Astronomy Magazine and made regular contributions to other outlets, including AstronomyToday and the Sierra Club. She has nine published books, including a children's picture book, Solar System Forecast, and a young adult dystopian novel, A Different Sky.| earthsky.org