Comet C/2025 R2 (SWAN), which reached its closest point to the Sun on September 12, will make its nearest approach to Earth on October 21, 2025. Astronomers say the comet could be visible to the naked eye under dark skies, offering stargazers a rare spectacle.

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•  Comet C/2025 R2 (SWAN) discovered earlier this year by Solar Wind ANisotropies (SWAN) instrument.
•  Reached perihelion on Sept 12 — came within 47 million miles (75 million km) of the Sun.
•  Closest approach to Earth on Oct 21, 2025.
•  Expected distance from Earth: about 44 million miles (70 million km).
•  Visibility improving since perihelion; brightening as it nears Earth.
•  May be faintly visible to the naked eye in dark, rural areas.
•  Best viewed just before dawn in the eastern sky.
•  Binoculars or small telescopes will enhance visibility.
•  No danger to Earth; purely a viewing event.
•  Astronomers urge enthusiasts to avoid city light pollution for best experience.