The eighth mission of the Boeing X-37B spaceplane is officially on as the vehicle is once again in Earth orbit, conducting secret missions.

Within six months of touching down from a 434-day orbital mission in March, Boeing’s X-37B spaceplane is back in action.

The X-37B is an uncrewed, autonomous spaceplane designed for advanced experimentation and testing. As a returnable orbital test vehicle, it enables officials to learn and analyze data more quickly. According to the manufacturer, the vehicle is healthy on orbit and proceeding with standard checkout.