<ul data-eligibleForWebStory="false"><li>Interstellar comet 3I/ATLAS, a new visitor to our solar system, may be extremely old.</li><li>Researchers suggest 3I/ATLAS could be 7 billion years old, 3 billion years older than our solar system.</li><li>This comet is the third interstellar visitor detected in our cosmic neighborhood.</li><li>Astronomers predict 3I/ATLAS, rich in water ice, will become active as it nears the sun.</li><li>The comet's discovery excites scientists, hinting at more insights into interstellar objects ahead.</li></ul>

Interstellar visitor 3I/ATLAS might be oldest comet yet seen

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