ESA’s Mars orbiters record interstellar comet 3I/ATLAS in once-in-a-lifetime encounter
The European Space Agency’s (ESA) ExoMars Trace Gas Orbiter (TGO) and Mars Express spacecraft recorded images of interstellar comet 3I/ATLAS on October 3, 2025, from about 30 million km (18.6 million miles) away, marking the closest observation of the object from any spacecraft so far.










