3I/ATLAS may be the oldest comet ever seen in 7 billion years, carrying secrets from before the solar system began
News October 31, 2025

3I/ATLAS may be the oldest comet ever seen in 7 billion years, carrying secrets from before the solar system began

Astronomers have identified 3I/ATLAS, an ancient, ice-rich interstellar comet potentially older than our solar system. Discovered by the University of Oxford, its origin in the Milky Way's thick disk offers a unique glimpse into early galactic processes. Scientists anticipate studying its composition as it nears the Sun, providing vital clues about the formation of stars and planetary systems.

**Ancient Comet 3I/ATLAS Could Be a 7-Billion-Year-Old Messenger From Before Our Solar System**

Get ready to meet a celestial traveler older than our own planetary neighborhood! Astronomers believe they've identified 3I/ATLAS, an interstellar comet that could be a staggering seven billion years old. This icy visitor, discovered by researchers at the University of Oxford, is not just old; it's a potential time capsule carrying secrets from the very beginnings of our galaxy.

What makes 3I/ATLAS so special? Unlike comets formed within our solar system, this one originated from far beyond. Its birthplace is thought to be the Milky Way's thick disk, a region populated by some of the galaxy's oldest stars. This means 3I/ATLAS formed during a period of galactic evolution far earlier than the birth of our Sun and planets.

The implications of this discovery are huge. Studying 3I/ATLAS offers a rare opportunity to peek into the conditions that existed before our solar system came to be. Because comets are essentially frozen remnants from the formation of stars and planets, they hold valuable information about the building blocks of these celestial bodies.

Scientists are particularly interested in the comet's composition. By analyzing the types of ice and dust it contains as it approaches the Sun and begins to release gas and particles, researchers hope to learn more about the raw materials that were present in the early Milky Way. This information could shed light on the processes that led to the formation of other stars and planetary systems throughout the galaxy.

While interstellar comets are rare, 3I/ATLAS stands out due to its extreme age and the potential to provide insights into a period of galactic history that is otherwise difficult to study. As 3I/ATLAS continues its journey through our solar system, astronomers will be watching closely, eager to decipher the ancient secrets it carries. This comet is more than just a space rock; it's a messenger from a time long before our own.
Category: Technology