Published: Dec 16, 2025, 23:04 IST | Updated: Dec 16, 2025, 23:04 IST
A rare interstellar comet is racing through our solar system. Comet 3I/ATLAS is glowing bright green, growing more active and offering scientists a once-in-a-lifetime chance to study material from another star system. What makes it glow? How close will it come? And why are astronomers calling this a cosmic gift?