Comet C/2025 R2 (SWAN) Might Become Visible to the Naked Eye in October: Here's What We Know https://ift.tt/PqGAl8n Comet C/2025 R2 (SWAN) Might Become Visible to the Naked Eye in October: Here's What We Know Astronomers report that Comet C/2025 R2 (SWAN), discovered in September, may brighten to near naked-eye visibility in October.