Comet is a logo design concept, which embodies our future in space travel. With current advancements in technology and space aviation, we will soon be capable of reaching distant places which we could not even imagine  decades ago.  

The logo itself represents a flying object "comet-like" rocket exploring and reaching far distances, where no human entered before. The icon represents the tip of the comet. But intead of being dragged down by gravitation, it looks upward towards exploring new places.