Precision instruments operated by the US space agency have mapped the chemical composition of a rare cosmic visitor crossing the planetary neighborhood. The object, cataloged as 3I/ATLAS, emits essential compounds for the construction of biological structures, as indicated by the spectral data collected during its passage through the internal region of the system. Detailed analysis of sublimated material reinforces theories about how the building blocks of organic matter can be transported across vast interstellar distances.

Fundamental elements detected

Readings taken by the SPHEREx space telescope allowed astronomers to break down the light reflected by the celestial body and identify specific molecular signatures. Entre the components found in the cloud of gas and dust that surrounds the nucleus include methanol and methane, substances frequently associated with pre-biotic chemical processes in different environments in the universe.

Another significant finding was the presence of hydrogen cyanide in considerable quantities. Este compound is known in organic chemistry for its crucial role in the synthesis of amino acids, the basic units of proteins. Confirmation of these elements suggests that 3I/ATLAS preserves materials formed billions of years ago in a star system different from ours, functioning as a chemical time capsule.

Although the detection of these ingredients does not mean the existence of living organisms on the comet, it provides robust evidence for the panspermia hypothesis. Este modelo científico propõe que os ingredientes necessários para o surgimento da vida são comuns no cosmos e podem ser distribuídos entre sistemas planetários por meio de corpos menores, como cometas e asteroides, que viajam à deriva pela galáxia.

Thermal activity and brightness

The physical behavior of the object underwent notable changes after its closest approach to Sol, a moment known as perihelion. The star’s intense heat penetrated the deep layers of the icy core, triggering the sublimation of underground volatile reserves and generating a delayed ejection of material.

This process resulted in a significant increase in the comet’s brightness about two months after passing through the most critical point in the orbit. The release of carbon dioxide, carbon monoxide and water vapor fueled the coma, the temporary atmosphere around the nucleus, facilitating observations from ground- and space-based spectrometers.

Route close to the planets

The interstellar visitor’s hyperbolic trajectory led him to cross paths with the large bodies of Sistema Solar. In October 2025, the object passed to a safe distance of Marte, allowing orbiters and rovers such as Perseverance to capture images of its expanding structure and the reflection of sunlight in the ejected dust.

Following its outward journey, 3I/ATLAS has a scheduled encounter with the neighborhood of Júpiter in March 2026. Astrônomos calculate that it will pass approximately 53 million kilometers from the gas giant. Jupiter’s immense gravity could exert a subtle influence on the comet’s escape route, offering a new window of opportunity to collect data on its orbital dynamics and composition.

Signal and source monitoring

Scientific teams took advantage of the object’s passage to investigate the possibility of technological emissions, using highly sensitive radio telescope networks. Frequency scans performed in search of technosignatures returned negative results, ruling out any artificial origin and confirming the natural nature of the celestial body.

Unlike previous visitors like ‘Oumuamua, which presented ambiguous characteristics, 3I/ATLAS behaves like a classic ice-rich comet. Sua distinct chemical composition, especially the abundance of cyanide higher than the average for local comets, points to a genesis in a protoplanetary disk with conditions different from those that formed Sistema Solar.