A new series of eight spacecraft images reveals the interstellar comet 3I ATLAS with unprecedented and almost unsettling clarity

By Sophie Calder – feplumbingheatingltd.co.uk

3I ATLAS is only the third confirmed interstellar object ever spotted near the Sun, after 1I ‘Oumuamua in 2017 and 2I Borisov in 2019. Each of these bodies arrived on a hyperbolic trajectory, moving too fast to remain gravitationally bound to the Solar System. They dive in, swing past the Sun and vanish again into deep space, carrying chemical fingerprints of distant planetary systems.

When surveys first picked up 3I ATLAS, astronomers quickly realised that ground-based telescopes would struggle to track its rapid motion and faint glow. The comet also approached on a geometry that placed it low in the sky for many observatories, giving short observation windows and noisy data. To follow it properly, researchers turned to space-based assets that can stare into the darkness with steady, unblinking cameras.