Astronomers Say Mysterious Dark Comet’s Acceleration May Not Be Driven by Ice
A puzzling small body in the solar system that has been described as a possible “dark comet” is now defying one of the leading explanations for its motion. New analysis suggests its unusual acceleration may not be caused by ice sublimating from its surface, deepening the mystery as Japanese spacecraft Hayabusa2 races toward a planned encounter. The finding raises fresh questions about how some faint, fast-moving objects behave and how scientists classify them.
