This illustration shows NASA's Mars Opportunity Rover, the second of the two Mars Exploration Rovers to land on the Red Planet in 2004 to search for signs of past life. NASA/JPL-Caltech It seems easy enough: If we can blast a man to the moon for a round of golf, why do we have...
思路点拨 根据第二段的“NASA wants to change that—if not at the International Space Station(ISS ), and then the moon and Mars—and stop throwing away tons of dirty clothes every year, putting them in the waste to burn up in the atmosphere aboard abandoned cargo(货物) ships."美国国家航空...
However, you can also get a job at NASA as a graduate of any other university. For example, a graduate student at the Moscow Power Engineering Institute got into NASA on the recommendation of his supervisor. The young man accepted the offer because he could not secure a level of income th...
【题目】完形填空How do you get rid of the body of dead astronau t on 30-month task to Mars and back? When should the plug be pulled on a seriously ill 1 who is us ng up precious 2 and endangering the rest of the crew? Should employ DNA testing to 3 astrona s who might get a...
You're looking at the world's first geosynchronous satellite, Syncom I. Unfortunately, it stopped sending signals just seconds before it got comfortable in its orbit. No matter. NASA launched Syncom II a mere five months later. Image courtesy NASA ...
Thousands of satellites fly overhead every day, helping us with things like weather forecasts, scientific research, communications, TV broadcasts (and maybe some surreptitious spying). How much do you know about these eyes in the sky?
百度试题 结果1 题目 35. How do the NASA's scientists feel about the future exploration? C A. Worried. B. Stressed. C. Confident. D. Serious. 相关知识点: 试题来源: 解析 答案见上 反馈 收藏
Artwork: How pulleys work#2: With two wheels, it's as though the weight is hanging from two ropes (the two strands of the same rope on the left), and a pulley halves the lifting force you need. It's like lifting the weight with two ropes instead of one. But you now have to pul...
A. They used straps to hold themselves to the toilet seat. B. Their spacesuits had bags strapped to their bottom. C. They used a special kind of helmet to control it. D. They used diapers in spacesuits. 58. What does NASA's "The Space Poop Challenge" aim to do? A. To encourage...
"Air-breathing rocket engine technologies have the potential of opening the space frontier to ordinary folks," said Uwe Hueter of NASA's Marshall Space Flight Center in Huntsville, Ala. In this edition of How Stuff WILL Work, you'll find out how you may fly into space on one of these ai...