In a rare cosmic encounter, the European Space Agency (ESA) has released the closest-ever images of comet 3I/ATLAS, thanks to a coordinated effort between its ExoMars Trace Gas Orbiter and Mars Express missions. This interstellar visitor — only the third known comet to originate from outside our solar system — passed near Mars in late September 2024, offering scientists a unique opportunity to study its composition and trajectory.
🔭 Dual Observations from Mars Orbit
ESA’s ExoMars orbiter and Mars Express spacecraft worked in tandem to capture high-resolution images and spectral data of comet 3I/ATLAS as it approached the Red Planet. The combined observations allowed researchers to analyze the comet’s coma (the glowing cloud of gas and dust surrounding its nucleus) and track its movement with unprecedented precision.
🌌 What Makes 3I/ATLAS Special?
Comet 3I/ATLAS is classified as an interstellar object, meaning it originated from outside our solar system — likely ejected from another star system millions of years ago. Its hyperbolic trajectory confirms it’s not gravitationally bound to the Sun and will eventually exit our solar system.
Unlike previous interstellar visitors like ‘Oumuamua and 2I/Borisov, 3I/ATLAS passed close enough to Mars for detailed imaging. This proximity enabled ESA’s instruments to detect key molecules and study how solar radiation affects the comet’s structure.
🚀 A Milestone for Planetary Science
The success of this dual-mission observation marks a milestone in planetary science and interstellar research. It demonstrates the power of international collaboration and multi-orbit coordination in capturing fleeting cosmic phenomena.
As ESA continues to analyze the data, scientists hope to uncover clues about the comet’s origin, its chemical makeup, and what it can teach us about the building blocks of other star systems.
Source: Earth.com
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