Interstellar comet 3I/ATLAS sparks public curiosity after Kim Kardashian’s question to NASA’s acting administrator, Sean Duffy, on platform X. She asked about the object just before Halloween, and Duffy replied that there are no aliens or threat to Earth. The comet, the third known origin outside the solar system, was detected in July by the University of Hawaii’s ATLAS system.
Avi Loeb, an astrophysicist from Harvard, raises hypotheses of possible artificial origin, estimating chances of between 30% and 40%. Other experts, such as David Jewitt of UCLA, say the observations fit natural comets. The object will pass within 170 million miles of Earth on December 19.
- Composition includes water, dust, carbon dioxide and carbon monoxide.
- Size estimated to be up to 3.5 miles wide.
- Activity detected more than 400 million miles from the Sun.
Detection and trajectory
Comet 3I/ATLAS was identified in July 2025 by the Asteroid Terrestrial Impact Alert System. Its hyperbolic orbit confirms interstellar origin. The closest passage to the Sun occurred last month, with intense brightness observed.
Trajectory follows a similar plane to planetary orbits, which Loeb interprets as possible intentionality. Astronomers attribute it to gravitational coincidences. Speed and direction indicate ejection from another star system.
Observed characteristics
Observations from the Hubble Space Telescope show a nucleus up to 5.6 kilometers in diameter. Cloud of dust and gas surrounded the comet early, differing from common patterns. Chemical composition reveals high carbon dioxide and nickel content.
A change to blue-green tones occurred upon solar approach. Non-gravitational forces affect motion, similar to jets of gas in comets. Data from the Gemini Observatory confirm material typical of icy objects.
Loeb Hypotheses
Avi Loeb publishes essays questioning whether the comet masks alien technology. He compares it to possible probes on a reconnaissance mission. Probability estimation is based on anomalies such as early activity and composition.
Loeb defends monitoring as a precaution against threats. He has participated in podcasts and interviews since his detection. Invitation to Kim Kardashian integrates scientific dissemination efforts.
Scientific community position
David Jewitt claims that all the features align with natural comets from the solar system. Breakthrough Listen’s Andrew Siemion notes public excitement without evidence of artificial signals. Terrestrial and space telescopes do not detect emissionsare abnormal.
Experts emphasize the need for additional data before drawing conclusions. Future observations by James Webb will occur in the coming weeks. Vera Rubin will identify more interstellar objects in the years to come.
Public repercussion
Kardashian’s question expanded searches for NASA’s planetary defenses. Joe Rogan discussed the topic on a podcast with Loeb. Incident at airport illustrates scope of debate among laypeople.
Scientific communication gains from celebrity interest, according to experts. Probability must accompany possibility in discussions. Duffy reinforced the absence of risks in direct response.
Future notes
Hubble and James Webb Telescopes plan new images of 3I/ATLAS. Data will help refine composition and trajectory. Passage in December allows detailed analyzes without intense solar interference.
