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京葡avfreeteen_News | 美国宇航局企图以太阳能推动新一代飞船

时间:2022/3/26 14:52:48   作者:admin   来源:   阅读:198   评论:0
内容摘要:  The American space agency NASA recently launched its DART spacecraft to test a method to defend Earth against threatening asteroids.  美国宇航...

  The American space agency NASA recently launched its DART spacecraft to test a method to defend Earth against threatening asteroids.


  NASA says the DART mission is also testing several new technologies. One of them is a propulsion system that gets power from the sun. The technology is called solar electric propulsion.


  Since the system uses solar power instead of fuel-based engines, it does not need large, heavy fuel tanks. If the technology is successful, it could help power a new generation of spacecraft.


  NASA officials have said solar electric propulsion can be important to the agency's plans for future exploration. This could include planned missions to take astronauts to the moon and Mars.


  The solar-powered system included on the DART mission is known as NEXT-C. It was developed by NASA's Glenn Research Center in Ohio and built by rocket maker Aerojet Rocketdyne.


  The technology is based on systems used on NASA spacecraft in the past that carried out asteroid 葡京文化 exploration missions. Scientists working on NEXT-C development said the new system is expected to be "about three times as powerful" as ones used in the past.


  Most propulsion systems use fuels to produce chemical reactions to provide thrust, moving the spacecraft. NEXT-C is a propulsion system that uses electricity to convert xenon gas into xenon ions. As the ions are released, they provide the force to move the spacecraft. Large solar collectors produce electricity from sunlight.


  NEXT-C is not the main propulsion system for DART. It was included in the mission to test its effectiveness. However, the technology will be the main propulsion system for the upcoming NASA mission called Psyche.


  The Psyche spacecraft will travel to a metal asteroid orbiting the sun between Mars and Jupiter. NASA says it expects to launch Psyche in August. The spacecraft is to travel about 2.4 billion kilometers over three-and-a-half years to reach the asteroid.


  Once in orbit, the mission team will examine data gathered by Psyche's science instruments. Scientists believe the asteroid may be part of the metallic core of an early planet. They say the asteroid could have separated during violent crashes that happened during our solar system's early formation.


  NASA says once Psyche separates from its launch vehicle, it will depend on solar electric propulsion to reach its target. The spacecraft is also expected to get a gravitational push when it passes by Mars.


  The space agency says Psyche 葡京注册投注 will be the first spacecraft to use the solar propulsion thrusters beyond the orbit of our moon. NASA describes the thrust as "gentle," but strong enough to propel the spacecraft on its long trip.


  NASA said testing has shown that the system is highly effective. Scientists estimate that Psyche's thrusters "could operate for years without running out 葡京弯看台 of fuel."


  Lindy Elkins-Tanton, of Arizona State University, is a NASA investigator and leads the Psyche mission. "Even in the beginning, when we were first designing the mission in 2012, we were talking about solar electric propulsion as part of the plan," she said in a statement. "Without it, we wouldn't have the Psyche mission."

  亚利桑那州立大学的 林迪·埃尔金斯-坦顿是美国宇航局的一名调查员,并领导了灵神星任务。她在一份声明中表示:“即使在一开始,在我们2012年首次设计该任务时,我们就在讨论将太阳能电力推进作为计划的一部分。没有它,就没有灵神星任务。”

  Paulo Lozano directs the space propulsion laboratory at the Massachusetts Institute of Technology (MIT). He told MIT Technology Review that he thinks Psyche can help create a path to new solar-powered space exploration. The technology could permit longer and less costly missions. "It actually opens up the possibility to explore and to commercialize space in a way that we haven't seen before," Lozano said.





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