As interstellar object 3I/ATLAS approaches its closest point to the Sun next month, astronomers are watching as the mysterious object continues to defy expectations. The object, which is largely believed to be a comet that came to us from outside the solar system, has been observed as it changes shape. Its tail has grown longer and its coma, a large atmosphere of gas and dust that surrounds a comet's nucleus, becomes more pronounced, expected characteristics from a comet ripping by the Sun at...