It is not often that the silent void of deep space delivers a visitor to our doorstep. Usually, the comets and asteroids we track are local residents, ancient debris bound to our Sun by gravity's invisible tether. But occasionally, something breaks the rules.
Since July, a mysterious traveller has been racing through our cosmic neighbourhood, sparking a blend of scientific excitement and existential curiosity. It is fast, it is unusual, and it is heading for a close encounter with Earth this December.
