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  • 9 months ago
Astronomers detailed 3I/ATLAS, a rare interstellar comet traveling more than 124,000 miles per hour, highlighting its value for understanding planet formation. The interstellar comet 3I/ATLAS follows a hyperbolic orbit (eccentricity ~6.1), confirming a brief solar system passage. First spotted July 1, 2025 by an ATLAS telescope in Chile, it showed non-gravitational acceleration and rapid brightening near the Sun in late October. With a core about 3.4 miles wide, it shifted from red to blue and passed Earth at roughly 167 million miles on December 19, 2025. International teams, NASA, and ESA reported a high carbon dioxide–to–water ratio; NASA’s Charles Lisse called it “well baked.” Officials noted no Earth threat. Data from ESA’s JUICE are expected in early 2026.

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00:003i atlas turns blue and accelerates without gravity manhattan-sized alien object approaches
00:06fast 3i atlas is a rare interstellar comet racing through the solar system at more than 124 000
00:14miles per hour discovered on july 1st 2025 it is only the third confirmed object known to have
00:20originated beyond the sun's gravitational influence immediately drawing global scientific attention
00:26for its size and unusual behavior with a core roughly 3.4 miles wide 3i atlas dwarfs previous
00:33interstellar visitors like umuamua and borisov some estimates suggest it could be millions of
00:40times heavier though its exact composition remains uncertain the comet follows a hyperbolic orbit with
00:46an eccentricity of about 6.1 confirming it is merely passing through the solar system this trajectory
00:53shows it spent most of its existence in deep interstellar space before briefly encountering
00:58the sun initially spotted by an atlas telescope in chile astronomers quickly identified earlier
01:04images from observatories worldwide this rapid international collaboration allowed scientists
01:09to reconstruct its path even before formal confirmation as it approached the sun in late
01:15october 2025 3i atlas displayed non-gravitational acceleration likely caused by powerful jets of gas
01:22and dust it also brightened rapidly and shifted from reddish hues to a striking blue glow on december 19th
01:292025 the comet made its closest approach to earth at about 167 million miles while harmless it offered
01:36astronomers and advanced amateur observers a rare viewing opportunity major observatories across multiple
01:42continents tracked the comet making it one of the most intensively studied interstellar objects to date
01:48analysis revealed an unusually high carbon dioxide to water ratio suggesting formation conditions very
01:54different from typical solar system comets nasa scientist charles lease described the comet as well
02:00baked implying it formed close to its original star before being ejected into space avi loeb a harvard
02:07scientist proposed more speculative explanations for its acceleration though most scientists favored natural
02:14outgassing experts disagree on how extraordinary the comet truly is balancing skepticism with openness to
02:20new possibilities nasa esa and other agencies coordinated observations despite setbacks like a us
02:27government shutdown that briefly slowed data releases december observations and esa's juice mission data
02:34expected in early 2026 may guide future interstellar detection and exploration efforts the comet sparked
02:42public fascination and online speculation prompting officials to stress there is no alien origin or earth
02:48threat like past celestial events 3i atlas blended science and myth its lasting importance lies in what it
02:56reveals about planet formation and chemistry beyond our solar system

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