The anti-tail of 3I/Atlas
The image below was released on October 15 by the Twin Two-Meter Telescope (TTT), which includes two pairs of 0.8 m telescopes from the Teid Observatory in the Canary Islands, Spain. The image is composed of 159 exposures of 50 seconds each, it was taken on August 2, 2025 and in it you can see a jet that extends a projected distance of about 6,000 km from the core of 3I/Atlas.
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How is it possible for a 6,000 km jet to emerge that is the antitail, the presence of an antitail is not a physical anomaly, but rather a confirmation that the comet is releasing large dust particles that are spreading throughout its orbit and that from our relative position we can see that projection as an antitail.
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Another example was the comet Lulin C/2007, and the photo is much clearer than the other one from 1950, it has the tail to the right of the image, the normal tail and then the antitail that would be in front, this comet showed a quite spectacular antitail, the calculation is that it reached 1 million kilometers, not 6,000 km like 3I/Atlas, but 1 million kilometers, the antitail can vary because it varies a lot depending on the visual angle from where We may be looking at it from Earth depending on the comet's orbit and the angle it has, but it was quite spectacular, so it is normal.
The images without reference were created with AI
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