The Juice space probe, operated by Agência Espacial Europeia, provided significant visual data about the celestial body 3I/ATLAS, captured during its traverse through the solar system. The observations, carried out in November 2025, revealed a dynamic structure composed of dust and gas, highlighting the object’s activity shortly after its passage through perihelion. The JANUS equipment was fundamental in recording the complexity of the phenomenon, which occurred while the ship followed its main trajectory towards the moons of Júpiter.
At the time of recording, the distance between the spacecraft and the interstellar visitor was approximately 66 million kilometers. The processed images allowed astronomers to identify detailed features such as the bright coma around the nucleus and an extended tail. Análises preliminary photographs suggest the existence of filaments and jets of material, indicating active physical processes on the surface of the celestial body, which does not originally belong to our planetary system.
Instrumentation and scientific data collection
To maximize the scientific return from this rare encounter, the mission deployed a suite of five distinct instruments. Além of the JANUS optical camera, which captured more than a hundred images at various wavelengths, specialized sensors were used for a complete scan. The MAJIS spectrometer took infrared readings, while the SWI instrument focused on analyzing the object’s chemical composition.
The investigation was complemented by the use of the PEP device, intended for particle detection, and UVS, which operated in the ultraviolet spectrum. The integration of these technologies provides a comprehensive view into the interaction between comet material and the space environment, including the influence of solar radiation. The data collected now forms a robust basis for in-depth studies into the physical and chemical nature of objects originating from other regions of the galaxy.
Challenges in transmitting information
Sending the data package to the ground stations required complex maneuvers due to the positioning of the probe in relation to Sol and Terra. Para To protect sensitive systems from intense solar radiation, the high-gain antenna was used as a heat shield, which forced the control team to carry out transmissions through the medium-gain antenna. Essa configuration resulted in slower throughput, requiring careful logistical planning.
After receiving complete information, scientists began a rigorous data processing and correlation phase. The current objective is to understand variations in the density of the cloud of gas and dust that surrounds the nucleus. The treated images, which highlight the object against the starry background, already help in the precise determination of the direction of movement and the orientation relative to the Sol, crucial elements for modeling the visitor’s behavior.
Origin and astronomical context
Initially identified in July 2025 by the ATLAS telescope at Chile, 3I/ATLAS is the third interstellar object cataloged by modern science to cross our cosmic neighborhood. Sua hyperbolic orbit and high velocity confirmed that it is not gravitationally bound to Sol. Apesar of its exotic origin, the celestial body exhibited behaviors typical of local comets, such as the sublimation of ice triggered by solar heat during its closest approach to the star.
The research teams scheduled meetings for the end of March to consolidate the discoveries obtained by the different Juice instruments. The expectation is that the detailed spectral analysis will reveal the object’s primordial composition, offering unprecedented clues about the formation of distant planetary systems. Enquanto data is examined on Terra, the probe continues its primary mission of exploring the Jovian system.
