The prefix "3I" designates it as the third confirmed interstellar object passing through the Solar System, after 1I/ʻOumuamua and 2I/Borisov. [21] 3I/ATLAS is an active comet consisting of a …

Dec 4, 2025 · Comet 3I/ATLAS is the third known object from outside our solar system to be discovered passing through our celestial neighborhood. Astronomers have categorized this …

Our goal is to be the best place on the web to both understand and experience 3I/ATLAS responsibly. Scroll the tabs at left for the story, then dive into interactive tools.

21 hours ago · Hubble's latest images of interstellar comet 3I/ATLAS reveal sustained, jet-like eruptions and a carbon dioxide-rich coma that challenge existing comet physics, offering a …

Track 3I/ATLAS in real-time with NASA data including current position, velocity, and sky coordinates.

See the live position and real-time trajectory of interstellar comet 3I/ATLAS (C/2025 N1). Our interactive tracker uses the latest NASA/JPL ephemeris data for the most accurate simulation.

Jul 7, 2025 · How do we know 3I/ATLAS, also called comet C/2025 N1 (ATLAS), is interstellar? Will it strike Earth? Can we visit it? Here are all of your questions answered.

Jul 2, 2025 · Significance: Discovered before perihelion, 3I/ATLAS offers a rare chance for extended observation, helping scientists explore the nature and history of objects traveling …

Aug 21, 2025 · Discovered in early July, the mysterious object known as 3I/Atlas has sparked intense speculation. Could it be a comet, a fragment of cosmic debris—or something far …

Sep 8, 2025 · Confirmed as a comet, 3I/Atlas is one of only three interstellar objects we’ve detected entering our solar system. Northeastern’s Jacqueline McCleary breaks down what …