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Planetary Defense

Viewing Posts from July 2025

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    NASA Discovers Interstellar Comet Moving Through Solar System

    Black and white star field with a red inset showing a close up view with orange crosshairs around a tiny white dot, representing the interstellar comet.

    On July 1, the NASA-funded ATLAS (Asteroid Terrestrial-impact Last Alert System) survey telescope in Rio Hurtado, Chile, first reported observations of a comet that originated from interstellar space. Arriving from the direction of the constellation Sagittarius, the interstellar comet has been officially named 3I/ATLAS. It is currently located about 420 million miles (670 million kilometers) […]

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