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A Groundbreaking Step for Commercial Space Exploration
- 2024/09/12
- 再生時間： 9 分
- ポッドキャスト
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サマリー
あらすじ・解説
On September 10, 2024, SpaceX successfully launched the Polaris Dawn mission, marking another milestone in private space exploration. This launch is not just any space mission—it is the first of three planned by the Polaris Program, spearheaded by billionaire Jared Isaacman. Polaris Dawn holds the promise of historic achievements, including the highest human spaceflight orbit since the Apollo missions and the first-ever commercial spacewalk. The mission embodies the growing role of private companies in space travel and the ambitious goals of furthering human exploration beyond Earth. The Launch: A Monumental Moment After multiple delays due to weather conditions and capsule recovery concerns, the Falcon 9 rocket carrying Crew Dragon Resilience successfully took off from Kennedy Space Center’s LC-39A launch pad in Florida. The smooth liftoff was followed by the successful return of the Falcon 9’s first stage to Earth, marking yet another reuse of the rocket—a key aspect of SpaceX's efforts to reduce the cost of space travel. Polaris Dawn is a high-profile mission that sets out to reach an unprecedented altitude for a manned spaceflight in the modern era. The crew on board will fly over 870 miles (1,400 kilometers) above Earth, breaking the record held by Gemini 11, a NASA mission launched in 1966. This is the farthest any human has been from Earth since NASA's Apollo Program, and it provides a unique opportunity to conduct a series of scientific experiments that were previously impossible at lower altitudes During its time in space, the Crew Dragon will travel through the South Atlantic Anomaly, exposing the crew to high levels of radiation for brief periods. This unique aspect of the mission will provide critical data on the effects of radiation on the human body, information that is key for future missions to the Moon and Mars Crew Members: Pioneers of Commercial Space Exploration The Polaris Dawn crew is made up of four individuals, each of whom brings a specific skill set essential to the success of the mission: Jared Isaacman: The 41-year-old billionaire is the mission commander. Isaacman, who made headlines with his leadership on the Inspiration4 mission, is no stranger to space. As a private spaceflight pioneer, he is leveraging his expertise in space and aviation to lead the Polaris Program. Isaacman also brings vast experience as a highly skilled fighter jet pilot. Scott Poteet: A retired Air Force lieutenant colonel and experienced fighter pilot, Poteet serves as pilot for the mission. Though this is his first trip to space, his military background and experience with high-stakes operations make him a valuable asset in ensuring the mission's success. Sarah Gillis: A lead SpaceX operations engineer, Gillis is one of the mission’s two mission specialists. She has been instrumental in training astronauts for previous SpaceX missions and will have a hands-on role in conducting scientific research and operating equipment. Gillis will be one of the two astronauts performing the first-ever commercial spacewalk during the mission. Anna Menon: Also a mission specialist, Menon is a medical officer and space operations engineer at SpaceX. She will be tasked with monitoring the crew's health during the mission and conducting various scientific experiments related to human physiology in space A Bold Scientific Agenda Polaris Dawn isn’t just a record-setting flight—it’s also a science-focused mission. The crew is tasked with carrying out 40 scientific experiments across various disciplines, including biology, physics, and medicine. One of the most significant experiments will examine how the human body reacts to deep-space radiation. The crew will be exposed to high radiation levels for short intervals during their journey through the South Atlantic Anomaly, providing valuable data on how future long-duration missions to Mars or the Moon might impact astronauts' health. Additionally, Polaris Dawn will study the effects of decompression sickness and spaceflight-associated neuro-ocular syndrome (SANS)—a condition that affects astronauts' vision during extended periods in space. The mission will investigate how reduced cabin pressure impacts the crew’s physiology and work on preventive measures that could be implemented for longer-term space missions The Spacewalk: A Commercial First One of the most exciting aspects of the Polaris Dawn mission is its plan to carry out the first-ever commercial spacewalk. On the third day of the mission, Jared Isaacman and Sarah Gillis will don specially designed EVA (extravehicular activity) suits and venture outside the Crew Dragon capsule for a two-hour spacewalk. Unlike the traditional ISS spacewalks, where an airlock allows astronauts to exit without depressurizing the entire spacecraft, Polaris Dawn’s spacewalk will involve depressurizing the entire Crew Dragon capsule. This will expose all four crew members to the vacuum of space, though only ...