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VOA科学技术--美国国家航空航天局延长了火星直升机任务

时间:2022-04-24 03:14来源:互联网 提供网友:nan   字体: [ ]
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NASA Extends Ingenuity1 Helicopter Mission on Mars

The American space agency NASA has extended flight operations on Mars for its Ingenuity helicopter.

Ingenuity landed on Mars a little over a year ago along with NASA's Perseverance2 explorer, or rover.

At first, NASA officials described Ingenuity as a demonstration3 mission. It was designed to see whether the small aircraft could take off, fly a short distance, and then land on the Red Planet.

The helicopter quickly succeeded in those areas during a series of tests. NASA said the flights marked the first time any aircraft had performed a powered, controlled flight on another planet.

Last May, NASA announced it was expanding Ingenuity's experimental mission. Since then, Ingenuity has kept flying on Mars. So far, the helicopter has completed 21 flights. On March 15, the space agency announced it was extending Ingenuity's mission through September.

Thomas Zurbuchen is associate administrator4 of NASA's Science Mission Directorate. He praised Ingenuity's progress. "Less than a year ago, we didn't even know if powered, controlled flight of an aircraft at Mars was possible," he said. "Now, we are looking forward to Ingenuity's involvement in Perseverance's second science campaign."

During that next science campaign, NASA says, Ingenuity will center on exploring an ancient river system on Mars' Jezero Crater5. Ingenuity has been working together with Perseverance in an area of Jezero known as Séítah.

NASA says the river system Ingenuity will help explore is very different from the areas it has been flying over since its first flight in April. The past flights have been carried out over mostly flat surfaces. The river system, called a delta6, rises more than 40 meters above the crater floor. It contains sharp cliffs, large rocks and sand-filled areas.

Such areas could present transportation difficulties for the Perseverance rover. So, the helicopter's main goal will be to help map a safe path for Perseverance to cross over into the delta, NASA said. In addition, data provided by the helicopter will help the Perseverance team assess possible science targets.

The river delta area is considered a good target for science experiments because it is believed to hold valuable geologic7 elements. NASA said the area may even contain "the proof necessary to determine (whether) microscopic8 life once existed on Mars billions of years ago." Perseverance is on a mission to search for signs of ancient microbial life on Mars.

Teddy Tzanetos is the Ingenuity team lead at NASA's Jet Propulsion Laboratory in California. He said the Jezero river delta campaign "will be the biggest challenge the Ingenuity team faces since the first flight at Mars." In preparation for the helicopter's upcoming activities, Tzanetos said he had increased the size of the team and upgraded the aircraft's flight software.

The upgrades are designed to permit Ingenuity to fly higher, make longer trips and improve safety in more difficult conditions.

So far, Ingenuity has flown more than 38 minutes and traveled 4.6 kilometers. NASA says the helicopter's 22nd flight is set to happen no earlier than March 19. It is expected to include a "complex" move requiring the aircraft to take a sharp turn to avoid a large hill in its path.

Ingenuity's chief pilot is Havard Grip. He noted9 that the continuing flights are quickly filling up a book he uses to record each trip. He said when the mission started, he thought he would be lucky to record five flights. "Now, at the rate we're going, I'm going to need a second book," Grip said.

Words in This Story

mission - n. an important project or trip, especially involving space travel

crater - n. a big hole in the ground created by the force of an object

cliff - n. an area containing high, steep rocks

assess - v. make a judgement about the quality, size, value, etc. of something

determine - v. to officially decide something because of evidence or facts

challenge - n. a difficult task or problem; something that is hard to do

upgrade - v. to improve something by making it newer or better quality


点击收听单词发音收听单词发音  

1 ingenuity 77TxM     
n.别出心裁;善于发明创造
参考例句:
  • The boy showed ingenuity in making toys.那个小男孩做玩具很有创造力。
  • I admire your ingenuity and perseverance.我钦佩你的别出心裁和毅力。
2 perseverance oMaxH     
n.坚持不懈,不屈不挠
参考例句:
  • It may take some perseverance to find the right people.要找到合适的人也许需要有点锲而不舍的精神。
  • Perseverance leads to success.有恒心就能胜利。
3 demonstration 9waxo     
n.表明,示范,论证,示威
参考例句:
  • His new book is a demonstration of his patriotism.他写的新书是他的爱国精神的证明。
  • He gave a demonstration of the new technique then and there.他当场表演了这种新的操作方法。
4 administrator SJeyZ     
n.经营管理者,行政官员
参考例句:
  • The role of administrator absorbed much of Ben's energy.行政职务耗掉本很多精力。
  • He has proved himself capable as administrator.他表现出管理才能。
5 crater WofzH     
n.火山口,弹坑
参考例句:
  • With a telescope you can see the huge crater of Ve-suvius.用望远镜你能看到巨大的维苏威火山口。
  • They came to the lip of a dead crater.他们来到了一个死火山口。
6 delta gxvxZ     
n.(流的)角洲
参考例句:
  • He has been to the delta of the Nile.他曾去过尼罗河三角洲。
  • The Nile divides at its mouth and forms a delta.尼罗河在河口分岔,形成了一个三角洲。
7 geologic dg3x9     
adj.地质的
参考例句:
  • The Red Sea is a geologic continuation of the valley.红海就是一个峡谷在地质上的继续发展。
  • Delineation of channels is the first step of geologic evaluation.勾划河道的轮廓是地质解译的第一步。
8 microscopic nDrxq     
adj.微小的,细微的,极小的,显微的
参考例句:
  • It's impossible to read his microscopic handwriting.不可能看清他那极小的书写字迹。
  • A plant's lungs are the microscopic pores in its leaves.植物的肺就是其叶片上微细的气孔。
9 noted 5n4zXc     
adj.著名的,知名的
参考例句:
  • The local hotel is noted for its good table.当地的那家酒店以餐食精美而著称。
  • Jim is noted for arriving late for work.吉姆上班迟到出了名。
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