A translation from German of a 1929 treatise by the author. Deals with the problem of the space travel. Expresses ideas about rocketry and space travel. Extensive treatment of the engineering aspects of a space station. Extensive bibliography. 100 drawings.

On November 29-30, 2018, in Washington, D.C., the National Academies of Sciences, Engineering, and Medicine held the Workshop on the Continuous Improvement of NASA's Innovation Ecosystem. The workshop was requested by the National Aeronautics and Space Administration (NASA) Office of the Chief Technologist with the goal of identifying actionable and implementable initiatives that could build on NASA's current innovation culture to reach a future state that will ensure the agency's continued success in the evolving aerospace environment. This publication summarizes the presentations and discussions from the workshop.

Safe Passage: Astronaut Care for Exploration Missions sets forth a vision for space medicine as it applies to deep space voyage. As space missions increase in duration from months to years and extend well beyond Earth's orbit, so will the attendant risks of working in these extreme and isolated environmental conditions. Hazards to astronaut health range from greater radiation exposure and loss of bone and muscle density to intensified psychological stress from living with others in a confined space. Going beyond the body of biomedical research, the report examines existing space medicine clinical and behavioral research and health care data and the policies attendant to them. It describes why not enough is known today about the dangers of prolonged travel to enable humans to venture into deep space in a safe and sane manner. The report makes a number of recommendations concerning NASA's structure for clinical and behavioral research, on the need for a comprehensive astronaut health care system and on an approach to communicating health and safety risks to astronauts, their families, and the public.