SMRTR Science & EngineeringJul 17, 2025Scientific American

New Interstellar Object 3I/ATLAS’s Biggest Mysteries Explained

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Astronomers have discovered 3I/ATLAS, the third known interstellar object in our solar system. This suspected comet is speeding past Jupiter's orbit and will exit our system by year's end. Scientists are rushing to study it using powerful telescopes.

Key questions include its origin, size, rotation, and composition. Initial estimates suggest it could be 1-2 kilometers wide and billions of years old. Observations as it nears the sun may reveal its chemical makeup.

This rare visitor offers a chance to study ancient material from another star system, potentially providing insights into planet formation across the galaxy.

SMRTR provides this summary for quick context. The original article belongs to Scientific American.

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