This Interstellar Comet Won't Return for Billions of Years #space #comet #astronomy

Added: 2026-04-30

[00:00:00]A once in a lifetime exit.

[00:00:02]Comet 3I/ATLAS is only the third interstellar visitor ever confirmed in our solar system. And now, it's leaving forever. Discovered in July 2025, 3I/ATLAS is a cosmic relic, possibly older than our sun with a nucleus up to 3.5 miles wide. Racing at over 150,000 miles per hour, it achieved escape velocity following a hyperbolic path that guarantees it will never return. After a close brush with Venus, Earth, and Jupiter, it's now speeding toward the Oort Cloud destined to vanish into interstellar space over thousands of years. NASA's SPHEREX telescope caught a dramatic outburst as it exited, revealing water, organics, and the building blocks of life, offering a rare glimpse into ancient material from another star system.

[00:01:01]3I/ATLAS is a messenger from the galaxy's dawn, reminding us how cosmic wanderers connect distant worlds. For more journeys beyond the stars, subscribe.