Interstellar comet 3I/ATLAS brightens as it nears the inner solar system

Interstellar comet 3I/ATLAS is unexpectedly brightening and has developed a visible tail as it approaches the inner solar system. New observations indicate the comet is becoming more active than anticipated, exhibiting a brighter coma and tail, a process typically associated with proximity to the Sun. The comet will fly by Mars on October 3 and reach its closest point to Earth on December 19, 2025, offering opportunities for observation.