New NASA analysis confirms presence of precursor molecules of life in a comet from another star system

Agência Espacial Americana (NASA) recently released data captured by the SPHEREx space telescope that indicates the existence of complex organic compounds in an interstellar visitor. The object, cataloged as 3I/ATLAS, crossed the inner solar system at the end of last year and showed surprising chemical activity as it approached Sol. The observations confirmed the presence of molecules essential for prebiotic chemistry, suggesting that the fundamental ingredients for life may be common in Via Láctea.

Originally identified in July 2025 by the ATLAS alert system, at Chile, the celestial body is the third interstellar object confirmed to cross our cosmic neighborhood, following in the footsteps of the mysterious ‘Oumuamua and comet 2I/Borisov. Diferente than its predecessors, 3I/ATLAS offered scientists a unique opportunity for detailed spectral analysis due to its intense outgassing.

SPHEREx instruments were able to isolate specific chemical signatures during the comet’s perihelion. The analysis revealed not only water and carbon monoxide, but also methanol and cyanogen. Este The latter is of particular interest to the scientific community, as it actively participates in the synthesis of amino acids, the building blocks of proteins in living organisms.

The discovery reinforces the theory of molecular panspermia, indicating that comets can act as transport vehicles for organic materials between different stellar systems. The detailed study of these volatile components helps to understand how the chemistry necessary for biology can be distributed throughout the universe.

Chemical composition and biological implications

Monitoring carried out between December 8th and 15th allowed astronomers to map the composition of the coma, the cloud of gas and dust that surrounds the comet’s nucleus. Solar heating has caused deep ice to sublimate, exposing materials that have remained untouched for eons in the cold of interstellar space.

The detection of cyanogen (CN radical) alongside methanol and carbon dioxide paints a complex chemical picture. In primitive planetary environments, these substances are crucial reactants. The presence of these elements in an object originating outside our solar system suggests that the chemical processes that led to life on Terra are not unique to our local environment.

Comparatively, 3I/ATLAS was much richer in volatiles than ‘Oumuamua, which had characteristics of a dry, rocky body. The new visitor’s vigorous activity enabled spectroscopic characterization that was not possible with the first interstellar object discovered, providing valuable data on the diversity of smaller bodies in the galaxy.

Trajectory and maximum approach to Terra

After surviving its passage close to Sol, the comet is now on its way out of the solar system, but before that it will provide one last opportunity for close observation. Orbital mechanics calculations indicate that the object will reach its closest point to Terra in March 2026.

• Estimated distance: Cerca 53 million kilometers from our planet.
• Visibility: Espera The comet’s brightness allows detailed observations by terrestrial and space telescopes.
• Speed: The object travels at hyperbolic speed, confirming that it will not be trapped by solar gravity.

During this approach phase, astronomers from around the world will coordinate efforts to refine data on the size of the nucleus, estimated to be between 440 meters and 5.6 kilometers. The variation in estimates is due to the difficulty of observing the solid core through the dense gas cloud that currently surrounds it.

Legacy for future space exploration

The passage of 3I/ATLAS validates the importance of continuous monitoring missions such as the SPHEREx telescope and the future Interceptor of Cometas of Agência Espacial Europeia (ESA). The ability to detect and chemically analyze these visitors in real time is fundamental to modern astrobiology.

The data collected will serve as a basis for models of planetary formation and distribution of organic matter in the galaxy. Unlike local comets, which are relics of the formation of our own solar system, objects like 3I/ATLAS are time capsules from other stars, bringing direct samples of the chemical composition of distant stellar nurseries.