The next SpaceX rocket launch was scheduled for this morning from the Boca Chica Starbase in Texas, but it was scrubbed just minutes before launch. SpaceX will try again in about 48 hours. The SpaceX website calls Starship "a fully reusable transportation system" and "the world's most powerful launch vehicle ever developed." The rocket will be unmanned for today's test flight, as Starship will attempt to orbit the Earth before splashing down in the Pacific Ocean off the coast of Hawaii.