SpaceX is preparing for its sixth test launch of Starship, as it aims to push the envelope in preparations for another potential 'catch' next year.CEO Elon Musk plans to attempt catching both the booster and upper stage, but this likely won't happen until next year.The next launch may not include the upper stage catch, but the possibility remains.SpaceX has rolled Starship to the launch pad, indicating the sixth test launch is nearing.