3I/ATLAS changed color again and what is it this time? The interstellar comet has shown a new blue hue after its recent brightening event behind the Sun. This is the third color change noted by astronomers, raising questions about the gases and materials that make up this rare cosmic visitor.
Source: https://economictimes.indiatimes.com/news/international/us/3i/atlas-changed-color-again-and-what-is-it-this-time-interstellar-comet-shocks-astronomers-with-new-anomaly-heres-what-triggered-the-change-and-how-to-watch-visitor-astronomers-sun-milky-way-perihelion-earth/articleshow/125095722.cms