Our solar system's famous "invader" might be as old as the Milky Way itself.

New evidence suggests that the famous interstellar traveler may be so old that its home system no longer exists.

The interstellar comet 3I/ATLAS, recently discovered in our solar system, could be nearly 12 billion years old. Its ...

At the time of the observations, comet 3I/ATLAS had just passed its perihelion, its closest ever approach to the Sun. While ...

The tail of Interstellar Comet 3I/ATLAS is seen in the imagery captured by the Gemini Multi-Object Spectrograph (GMOS) on ...

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Interstellar Comet 3I/ATLAS is the gift that keeps on giving. A snapshot of space that lies beyond the solar system, it brings clues to our understanding of other stars, other worlds and the galaxy we ...

Comet 3I/ATLAS continues to make astonishing headlines, thanks to new findings from astronomers using the Atacama Large Millimeter/submillimeter Array (ALMA). This new research reveals that 3I/ATLAS ...

The interstellar comet 3I/ATLAS contains water and carbon molecules at levels never before seen in our solar system. This suggests that it formed around an alien star radically different from and much ...

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For a technological object, such a beam could deflect the solar wind, and the dust veil is also just sufficient to block ...