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Interstellar Comet 3I/ATLAS Set for December 2025 Flyby

12/18/2025

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Summary

Story summary

The interstellar comet 3I/ATLAS will make its closest approach to Earth on December 19, 2025, about 167 million miles away.
It will be the third known interstellar object to traverse our solar system.
Observers will have their best chance to view it with telescopes near Regulus in Leo.
The anti-tail pointing toward the Sun suggests unusual physical properties.
The Virtual Telescope Project will live stream the approach on December 18.

History

Historical Context

Comet Hale-Bopp, discovered independently by Alan Hale and Thomas Bopp on July 23, 1995, became one of the most observed comets in history. Visible for 18 months, it peaked at magnitude -1.8 in April 1997, captivating millions. This event parallels the anticipated approach of interstellar comet 3I/ATLAS, highlighting humanity's enduring fascination with celestial phenomena and the importance of astronomical engagement.

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Story summary

The interstellar comet 3I/ATLAS will make its closest approach to Earth on December 19, 2025, about 167 million miles away.
It will be the third known interstellar object to traverse our solar system.
Observers will have their best chance to view it with telescopes near Regulus in Leo.
The anti-tail pointing toward the Sun suggests unusual physical properties.
The Virtual Telescope Project will live stream the approach on December 18.

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