Comet 3I/ATLAS Today: Latest News, Science Updates, and How to See the Rare Interstellar Comet Before Its Dec. 19, 2025 Flyby
Updated Wednesday, Dec. 17, 2025 — Interstellar comet 3I/ATLAS (also referenced as C/2025 N1 (ATLAS)) is now just two days from its closest approach to Earth, and today’s coverage spans everything from practical skywatching advice to fresh scientific analysis of the comet’s “non‑gravitational” motion. Space+1 On Friday, Dec. 19, 2025, 3I/ATLAS will reach its minimum distance from Earth — but don’t let the phrase “closest approach” fool you. NASA says the comet will still be about 1.8 astronomical units away (roughly 170 million miles / 270 million kilometers), nearly twice Earth’s distance from the Sun — a wide, safe margin that puts any impact fears firmly to rest. NASA Science+1 So why