ESA Confirms 3I/ATLAS Earth Proximity Date
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Main Topic: Comet 3I/ATLAS – An interstellar comet currently approaching Earth.
Key Facts about 3I/ATLAS:
* Discovery: Detected by the Earth Impact Alert System on July 1, 2025.
* Origin: The third object detected originating from outside our solar system.Its name reflects this (“3I” signifies interstellar).
* Speed: Exceptionally fast – at least 221,000 kilometers per hour (unprecedented for a visitor to our solar system). It’s not substantially affected by the Sun’s gravity due to this speed.
* Size: estimated by NASA to be “a few” kilometers in diameter, but not officially confirmed.
* Composition: An icy nucleus with a coma (cloud of gas and dust), classifying it as a comet.
* Age: Formed billions of years ago.
* Current Location/Trajectory:
* Discovered 670 million kilometers from the Sun (within Jupiter’s orbit).
* Closest approach to Mars: October 3rd (30 million kilometers).
* Closest approach to the Sun: October 30th (210 million kilometers).
* Will reach its closest point to Earth in the coming days (date not specified).
Why it’s meaningful:
* Interstellar comets are rare and provide clues about the formation of planetary systems beyond our own.
* Its unusual characteristics (speed, origin) make it a fascinating subject for astronomers.
Other Information:
* The article links to an interview with physicist Javier Santaolalla about the comet (https://www.nationalgeographic.com.es/ciencia/javier-santaolalla-fisico-divulgador-sobre-3iatlas-cosas-raras-son-muy-comunes-ciencia_26568).
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