3I/ATLAS: The Interstellar Comet That Brushed Past the Sun — Post-Perihelion Changes and Controversy

“NASA image of interstellar comet 3I/ATLAS showing brightened tail and coma after perihelion”

What Is 3I/ATLAS? In October 2025, astronomers around the world turned their eyes to a remarkable object —3I/ATLAS (C/2025 N1), the third confirmed interstellar object ever detected. Following 1I/ʻOumuamua and 2I/Borisov, 3I/ATLAS travels through our solar system on a hyperbolic trajectory (eccentricity ≈ 6) — meaning it’s not gravitationally bound to the Sun and will … Read more