"In July, researchers using the NASA-funded Asteroid Terrestrial-impact Last Alert System survey telescope in Chile made an exceedingly rare discovery: a mysterious object passing through the solar system at far too high a speed to be bound by the Sun's gravity."
"As the visitor made its closest approach to Earth, coming within just 167 million miles on December 19, an international team of researchers from the alien-hunting astronomy project Breakthrough Listen pointed the Green Bank Telescope - the largest single-dish radio telescope in the world - at 3I/ATLAS."
"No artificial radio emission localized to 3I/ATLAS was detected"
An object designated 3I/ATLAS was detected in July by the NASA-funded ATLAS survey telescope in Chile moving fast enough to be unbound from the Sun. Observations point toward a natural comet with an icy nucleus and a bright coma of gas and dust, though the possibility of technological origin was suggested by Avi Loeb and has been reconsidered as more data accumulate. As 3I/ATLAS approached within about 167 million miles on December 19, Breakthrough Listen observed it with the Green Bank Telescope and detected no candidate or localized artificial radio signals. The object continues to behave as expected from natural astrophysical processes but remains an unusually valuable target due to the rarity of interstellar visitors.
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