British astronomers have discovered an interstellar object named 3I/ATLAS, likely the oldest comet ever seen, potentially three billion years older than our solar system. First spotted on July 1, 2025, this water ice-rich comet comes from a unique region of the Milky Way and may be visible through amateur telescopes in late 2025 and early 2026.
Explain It To Me Like I’m 5: A special space object named 3I/ATLAS, discovered by British astronomers, is thought to be the oldest comet ever seen and comes from a different part of our galaxy.
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