Reusable rockets are spacecraft designed to be launched, landed, and then launched again multiple times. This technology aims to reduce the cost of space travel by allowing the same rocket components to be used for different missions. Companies like SpaceX have pioneered this approach, significantly changing the economics of space exploration. The main components of reusable rockets typically include the first stage, which provides the initial thrust to escape Earth's atmosphere. After completing its mission, this stage can return to a designated landing site, either on land or on a floating platform in the ocean. This innovation helps make space more accessible and sustainable.