Interstellar Comet 3I/ATLAS Brightens, Turns Green Ahead of Earth Flyby

• Interstellar comet 3I/ATLAS is rapidly brightening and turning greener after its close solar passage.
• New images from Gemini North on 26/11/2025 confirm the comet's green glow, caused by diatomic carbon excited by sunlight.
• The comet will make its closest approach to Earth on 19/12/2025, passing within 170 million miles.
• 3I/ATLAS is the third interstellar object discovered and is believed to be the largest and oldest.
• Scientists are studying the comet to gain insights into early star systems and galactic formation.

Why It Matters: Interstellar comet's changes offer clues to its origin and early star system formation.