Education isnt the only goal of CubeSats. Because these tiny, technology-filled boxes are relatively inexpensive to build and can be put together quickly, theyre perfect for testing new technologies that might one day be used on major space tasks.

The biggest challenge now is to find ways to bring the satellites back to the earth after a year or two. Otherwise, major highways of space junk could gradually increase as CubeSats become more common.

Nowadays, college and high school students are getting a chance to learn what it takes to explore in space. Somedayperhaps a lot sooner than you imagineyou might get to design, build and launch your own satellite. If you do, youre sure to have fun. And you might also get crazy about science for life.

58.Compared with the traditional ones, the new satellites __________.

A.need long start-up times B.are low-cost and small-sized

C.are very hard to operate D.collect more information in orbit

59.What does the underlined word obstacle probably mean?

A.An aim to achieve in the near future. B.An imagination that kids usually have.

C.Something dangerous to terrify people. D.Something difficult that stands in the way.

60.According to the passage, which of the following is true?

A.CubeSats could possibly cause pollution in space.

B.A few kids will send applications for the project.

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