It is a cosmic enigma that has left astronomers scratching their heads: a mysterious object, hurtling into our solar system from the vast gulf of interstellar space, which appears to have a regular, rhythmic heartbeat. This celestial pulse, detected in the light of the comet 3I/ATLAS, is not random; it repeats with a precise period of 16.16 hours. Now, in a twist worthy of a Hollywood blockbuster, a theory has emerged that this very rhythm — and the physical mechanism behind it — could be tied to one of Jupiter's most distant and mysterious moons, Callisto.
The object in question, 3I/ATLAS, is only the third interstellar visitor ever confirmed in our star system, following the baffling trajectory of 1I/'Oumuamua and 2I/Borisov. While its origins are alien to our sun, its sudden activity has been anything but quiet. Observations from ground-based telescopes, the Hubble Space Telescope, and the James Webb Space Telescope all confirmed that its brightness is not constant, but instead varies periodically, with an amplitude measured in the tens of percent.
