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Ancient Comet Stuns Scientists: Older Than Solar System!
22 Jun
Summary
- Interstellar comet 3I/Atlas is nearly three times older than our solar system.
- Its chemical composition is unlike any known solar system body.
- The comet formed in an extremely cold environment, possibly near star birth.
Observations suggest comet 3I/Atlas, an interstellar visitor, could be up to 12 billion years old, far exceeding the 4.5 billion-year age of our solar system. This makes it potentially the oldest object ever observed in our solar system. Its elemental composition, analyzed by the James Webb Space Telescope and Alma observatory, is distinct from any known solar system body.
The comet exhibits a deuterium ratio ten times higher than typical solar system comets, indicating it formed in a frigid environment below -243C. Scientists theorize it may have formed near nascent stars during an era of intense star formation known as 'cosmic noon,' approximately 10 billion years ago. Untethered, it likely traversed vast galactic trajectories for eons before its recent passage through our solar system.
While previous interstellar objects like 1I/'Oumuamua and 2I/Borisov were detected, they lacked the brightness for detailed isotopic analysis. Despite speculation about alien technology, NASA has dismissed these theories, with SETI finding no evidence of extraterrestrial technology. As 3I/Atlas departs, astronomers anticipate discovering many more such objects with new observatories, promising further insights into galactic formation.
