3I/ATLAS, also known as C/2025 N1 (ATLAS) and previously as A11pl3Z, is an interstellar comet [18][19] discovered on 1 July 2025 by the Asteroid Terrestrial-impact Last Alert System …

Dec 2, 2025 · Discovery Comet 3I/ATLAS was discovered by the NASA-funded ATLAS survey telescope in Rio Hurtado, Chile, and reported to the Minor Planet Center on July 1, 2025. The …

2 days ago · GBT scanned 3I/ATLAS from a distance of about 167 million miles (269 million kilometers), making observations that spanned four bands of the radio spectrum.

Track 3I/ATLAS, the newly discovered interstellar object flying by Earth in 2025. Real-time countdown, news updates, educational resources, and astronomical insights.

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.

Dec 23, 2025 · 3I/ATLAS may have moved away from Earth as it makes its way out of the solar system, but this interstellar intruder continues to delight and surprise astronomers.

Jul 2, 2025 · Discovery by the ATLAS Survey Comet 3I/ATLAS was first identified by the Asteroid Terrestrial-impact Last Alert System (ATLAS), a global network of four robotic telescopes …

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 …

Dec 22, 2025 · Comet 3I/ATLAS Hubble Space Telescope image of the interstellar comet 3I/ATLAS. Hubble photographed the comet on July 21, 2025, when the comet was 446 million …

Sep 8, 2025 · Comet or alien spaceship? An astrophysicist explains what we know about interstellar traveler 3I/Atlas Confirmed as a comet, 3I/Atlas is one of only three interstellar …