Interstellar Comet 3I/ATLAS Found to Be Older Than the Solar System

The interstellar comet 3I/ATLAS, discovered recently, is believed to have originated from the outer regions of the Milky Way galaxy, specifically from the thick disk area. This comet is thought to be significantly older than Earth, the Sun, and the entire solar system itself, with estimates suggesting it could be over 7.6 billion years old. In contrast, our solar system formed approximately 4.5 billion years ago.

A research team from Europe, led by astrophysicist Matthew Hopkins of the University of Oxford, has presented these findings based on the initial data collected. The high velocity of 3I/ATLAS suggests it has a different origin compared to the previously identified interstellar objects, 1I/?Oumuamua and 2I/Borisov. The team anticipates that the comet may have a higher water content than earlier interstellar visitors, a hypothesis that forthcoming observations may confirm.

Recent images released by the European Southern Observatory (ESO) show the comet in motion against the backdrop of distant stars. Utilizing data from the Very Large Telescope (VLT), the ESO has created the most detailed image yet of this unique celestial body. As the comet continues on its trajectory towards the Sun, it will remain observable for several months, providing opportunities for further study.

3I/ATLAS was initially detected in Chile using the Asteroid Terrestrial-impact Last Alert System (ATLAS) just over a week ago. Subsequent analyses of older images from as far back as June 14 confirmed its trajectory, establishing that it is merely passing through our solar system. The comet is expected to approach Earth at a distance of approximately 1.6 astronomical units, remaining farther away than the Sun. It is estimated to be several kilometers in diameter, with a tail extending over 25,000 kilometers.