Astronomers have detected a strange, heartbeat-like pulse coming from the interstellar object 3I/ATLAS, which brightens and dims every 16.16 hours, a rhythm that has fascinated researchers and set social media buzzing with speculation about its potential impact on Jupiter's moon Callisto.
But despite the attention, scientists stress that the effect is purely optical and carries no threat whatsoever to Jupiter, its moons, or the wider Solar System. NASA says the flicker is due to reflected sunlight, not a change in mass, orbit, or energy output.
