Avi Loeb, an astrophysicist at Harvard, stated that the interstellar comet 3I/ATLAS, with an estimated mass of 50 billion tons, could be an alien spacecraft due to its anomalous characteristics. The object, discovered in 2025, is a million times larger than known asteroids, according to Loeb. It will be closest to Earth on December 19th, and the European Space Agency’s JUICE probe will analyze it between November 2nd and 25th. Loeb’s theory, published on his blog, sparked debate among experts.
The scientist highlights that the comet’s jets may indicate technological propellants, not natural processes. The presence of hydroxyl gas, detected by NASA, suggests water, but does not rule out Loeb’s hypothesis. The Neil Gehrels Swift Observatory confirmed the object’s chemical composition. Images from Japan, which show a supposed “ship” nearby, have intensified speculation.
Loeb leads the Galileo Project, which searches for evidence of extraterrestrial intelligence. He identified 10 unusual features in 3I/ATLAS, such as size and speed, that defy conventional explanations. NASA has beefed up its planetary defense, according to rumors, but has not commented on the theory.
- Size: 50 billion tons, a million times larger than 1I/Oumuamua.
- Trajectory: Will pass close to Earth on December 19, 2025.
- Analysis: JUICE probe will collect data between November 2nd and 25th.
- Composition: Presence of hydroxyl gas, indicating water.
Loeb theory gains prominence
Loeb’s hypothesis is based on the statistical improbability of such a large natural object. He compares 3I/ATLAS to 1I/Oumuamua, discovered in 2017, which also showed anomalies.
The scientist suggests that ion thrusters or alien technologies would explain the object’s loss of mass. The scientific community, however, urges caution until the JUICE probe is analyzed.
Anomalous features of the comet
3I/ATLAS has a speed and trajectory that intrigue astronomers. Its mass exceeds that of any known comet.
Japanese images, not yet verified, show an object close to the comet. NASA has not confirmed these claims.
Loeb advocates a mission to intercept 3I/ATLAS and clarify its nature. The JUICE probe will be crucial for the next steps.
The scientific community awaits concrete data before validating the theory.
Response from NASA and ESA
NASA detected water on the comet, but does not endorse the idea of artificial origin. The Swift Observatory has identified compounds typical of comets.
ESA, responsible forJUICE probe, plans to study the object in detail. The probe’s instruments will analyze composition and structure.
The data collected can confirm or refute Loeb’s theory. The agency maintains a neutral stance on speculation.
Global space agencies monitor the comet to avoid risks to Earth.
Debate in the scientific community
Loeb is known for bold theories, such as 1I/Oumuamua. His ideas divide opinions among astronomers.
Critics argue that natural processes explain the 3I/ATLAS anomalies. The presence of water reinforces this view.
The analysis of the JUICE probe will be decisive for the debate. Until then, speculation continues to grow.
Possible implications of the discovery
If confirmed, Loeb’s theory would change the understanding of extraterrestrial life. Scientist calls for global surveillance.
The JUICE probe will provide data within a few weeks, but complete results could take months.
Comet Analysis Preparations
ESA adjusted the trajectory of the JUICE probe to maximize data collection. The mission is an international collaboration.
