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This spring, skywatchers have been treated to the captivating and unpredictable display of a new comet, called C/2025 F2 (SWAN). Discovered in late March 2025 through data from the SWAN instrument aboard NASA and ESA’s Solar and Heliospheric Observatory, this long-period comet is making its journey to the inner solar system from the distant Oort Cloud. Amidst the excitement of a new celestial visitor, observers have taken note of its unpredictable behavior.   

When an explosion in space occurs, professional and citizen scientists must obtain data on it as soon as possible. That is why the SETI Institute and Unistellar’s Cosmic Cataclysms program is collaborating with the mobile and web application Astro-COLIBRI — to make notifications of these elusive events available to everyone as soon as they are detected.