Share the news to friends and circles of friends with wechat scanning QR code < / P > < p > on September 13. On Sunday, local time, American space exploration technology company SpaceX sent both Falcon 9 rocket and manned dragon spacecraft to the launch pad, preparing to launch the world's first pure commercial manned space mission on the 15th < p > Jared Isaacman, billionaire, founder and CEO of e-commerce company shift4 payments, will lead three companions on a three-day space trip. They will make history and become the first non professional team composed of ordinary people to enter earth orbit < p > Isaacman, 38, paid an unknown amount to SpaceX so that he and three specially selected travel partners could enter space in a manned dragon spacecraft < p > the spacecraft will be launched from NASA's Kennedy Space Center. The launch window will open at 8 p.m. EDT on the 15th for 24 hours. However, the window will shrink in a few days and may even change, depending on weather conditions < p > the track trip called inspiration 4 was conceived by Isaacman to improve people's support for St. Jude's children's research hospital, a leading pediatric cancer research center. He has personally pledged $100 million to the fund < p > if the space flight is successful, it will help to open a new era of commercial space tourism. At present, several companies in the industry are competing for rich customers who may be willing to spend money to experience supersonic flight, weightlessness and space visual wonders < p > when space travel itself is very dangerous, it is crucial to set an acceptable risk level for consumers, which raises a sharp problem. Sridhar tayur, Professor of operation management and new business model at Carnegie Mellon University in Pittsburgh, asked, "do you have to be rich and brave to board these flights now?" < / P > < p > SpaceX is undoubtedly the most famous participant in the booming commercial space enterprises, It has launched a large number of cargo payloads and a number of astronauts for NASA to the international space station < p > SpaceX's competitors virgin galaxy and blue origin recently completed their first space tourism mission with the participation of their founders. But these two high-profile flights were suborbital flights, which only sent ordinary people to the edge of space and returned after staying for a few minutes < p > in the inspiration4 mission, SpaceX's manned dragon flying ship will carry four passengers who have never entered earth orbit before. In space, Isaacman and others will fly around the earth every 90 minutes at a speed of more than 27000 kilometers per hour, which is about 22 times the speed of sound. The target altitude is 575 kilometers, beyond the orbit of the international space station and even the Hubble Space Telescope < p > like blue origin, the 20 story SpaceX launch vehicle and manned dragon spacecraft will take off vertically from the launch pad and fly directly into space. In contrast, Virgin Galactic's suborbital spacecraft needs to be controlled by two trained pilots, which can send four passengers in the back seat to the edge of space 80 kilometers high < p > although two members of the inspiration4 mission, Isaacman and earth scientist Sian Proctor, are licensed pilots, they will not participate in the operation of the manned dragon spacecraft < p > previously, Isaacman often flew commercial and military jets, so he assumed the role of "commander" of the mission. Proctor, 51, was a NASA astronaut candidate and was designated as a "pilot" of the mission < p > among the crew were Hayley Arceneaux, 29, the "chief medical officer" and Chris sembroski, the "mission expert". Among them, acecheno was a survivor of bone cancer and later became a doctor's assistant at St. Jude's children's research hospital. Sembrosky, 42, is a US Air Force veteran and aerospace Data Engineer < p > the four crew members have experienced strict preparations in the past five months, including altitude adaptation training, centrifuge training, microgravity and simulator training, emergency exercise, theoretical knowledge learning and physical examination. Inspiration 4 emphasizes that this mission is not just a space ride. After entering orbit, the crew will conduct medical experiments, "which will have potential application value to human health on earth and in future space flights" < p > in a series of documentaries made by Netflix, asecheno said that her motivation to participate in the mission was largely to ignite the hope of cancer patients. She said, "I want to show them what life will be like after cancer." (small) < / P > < p >