Archive · 11 Nov 2025
Interstellar Comet 3I/ATLAS Displays Mysterious Anti-Tail Jets
Imagine a giant icy rock flying through space from another star system, called comet 3I/ATLAS.
Scientists recently saw it had big streams of dust and gas shooting out, like a fountain.
Some of these streams, called anti-tails, strangely point towards the Sun, while a longer one points away from the Sun.
These streams are super long, stretching millions of kilometers!
This is surprising because scientists thought it had lost its tail.
The way these streams are organized has made some people wonder if it's just a natural comet or maybe even something made by advanced aliens.
Scientists are looking at it very closely to figure out what it's made of and where it came from, especially since it will get closer to Earth soon.
Interstellar comet 3I/ATLAS has displayed mysterious anti-tail jets pointing towards the Sun and a longer tail jet extending away from it.
The anti-tail jets stretch approximately 0.95 million kilometers, while the main tail jet spans about 2.85 million kilometers.
The comet's mass loss rate is estimated at 50 billion tonnes per month, suggesting a nucleus diameter of at least 5-10 kilometers.
This reappearance of a tail and prominent jets is notable, as recent observations had shown the comet without a tail.
The unusual structure and mass loss have led to speculation about the comet's origin, including the possibility of advanced interstellar technology.
- Who
- British astronomers Michael Buechner and Frank Niebling, and Harvard astrophysicist Avi Loeb, along with astro-photographers M Jager, G Rhemann and E Prosperi.
- What
- Observation and analysis of mysterious anti-tail and tail jets emanating from interstellar comet 3I/ATLAS, with speculation arising about its origin.
- When
- Observations of the jets were made on November 8 and 9, 2025.
- Where
- In interstellar space, with observations made from Earth.
- Why
- To study the unusual structure and composition of the interstellar comet 3I/ATLAS, which has exhibited a sudden reappearance of its tail and prominent jet structures.
Natural Comet
Advanced Technology
Origin and Structure
Natural Comet
The unusual jet structures and significant mass loss rate suggest it is a natural comet, possibly larger than initially estimated.
Advanced Technology
The highly organized and massive ejection of material, particularly the collimated jet, sparks speculation about it being a piece of advanced interstellar technology.
- Object
- Interstellar Comet 3I/ATLAS
- Observation Date (Jets)
- November 9, 2025
- Observation Date (Other Jets)
- November 8, 2025
- Anti-Tail Jet Length
- Approx. 0.95 million kilometers towards the Sun
- Tail Jet Length
- Approx. 2.85 million kilometers away from the Sun
- Estimated Mass Loss Rate
- 50 billion tonnes per month
- Estimated Nucleus Diameter
- At least 5-10 kilometers
- Closest Approach to Earth
- December 19, 2025