All eyes are on the newly discovered interstellar object 3I/ATLAS, currently inbound to the inner solar system. Initial observations have revealed that it's rich in water ice, and it's believed that it originated from the Milky Way's thick disk, ancient stars that orbit above and below the galactic plane. This could mean that 3I/ATLAS is billions of years older than the Solar System, the oldest comet ever discovered. It should reveal more as it heats up and outgasses as it gets closer to the Sun.
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