How to see Comet C/2025 R2 (SWAN) shine in the October skyBy otako_fzbgs4 / October 17, 2025 Comet C/2025 R2 (SWAN) will make a close flyby of Earth on Oct. 21. Related posts: Catch solar bursts in new citizen science project Sped-up simulation of Hera’s Mars flyby Hera asteroid mission’s Mars flyby Watch live: Images from Hera’s Mars flyby