NASA, t/Space developed a plan and re-usable vehicle to support the International Space Station (ISS) for after the shuttle's retirement in 2011. The Roton is a crewed spacecraft that is owned and operated by private enterprise. NASA has now adopted commercial support as its baseline plan for the ISS. In 2009, Chapman formed the Solar High Study Group, "a team of senior managers and technologists with directly relevant experience who believe that space-based solar power can solve the problem of bringing clean, affordable energy to people anywhere on Earth or in space." In July 2010, Chapman presented slides to the US Air Force on the topic of Tactical and Strategic Implications of Space-Based Solar Power (SBSP). Main conclusions include the US is able to deploy SBSP within 7 years with technologies now at Technology Readiness Level 6+ and that a study of national security implications of SBSP is urgently needed. Information from this event will contribute to a USAF policy paper on its energy strategy. Views on global warming On 23 April 2008, Chapman authored an op-ed in The Australian newspaper, noting a new ice age will eventually occur, that based on current low solar activity it might even be imminent, and "It is time to put aside the global warming dogma, at least to begin contingency planning about what to do if we are moving into another little ice age, similar to the one that lasted from 1100 to 1850." A response by IPCC affiliated meteorologist David Karoly was published a few days later. Chapman wrote a blog that included 17 entries categorized as Global Warming. Those entries presented much data and commentary to support his point of view. Honorary positions Advisor to the Space Frontier Foundation Biography Chapman's career is chronicled in the book "NASA's Scientist-Astronauts" by David Shayler and Colin Burgess. Chapman's NASA years are also described in Australia's Astronauts: Three Men and a Spaceflight Dream, 1999, by Colin Burgess. Chapman died on 5 April 2021, at the age of 86. Partial bibliography See also List of astronauts by name List of astronauts by selection Timeline of astronauts by nationality List of human spaceflights Other Australian astronauts Paul D. Scully-Power Andy Thomas References External links Spacefacts biography of Philip K. Chapman 1935 births 2021 deaths American astronauts Australian astronauts Australian emigrants to the United States Military personnel from Melbourne MIT School of Engineering alumni Naturalized citizens of