BEIJING: China on Thursday successfully launched the world’s most powerful solid propellant rocket. Developed by Chinese commercial aerospace company Orienspace, the medium-lift rocket named Gravity-1(YL-1) successfully sent three Yunyao-1 meteorological satellites into orbit in its maiden flight from waters off the coast of Haiyang City, east China’s Shandong Province at 1:30 p.m. (Beijing Time). The Gravity-1 has a total height …