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d라이브러리

"than"(으)로 총 170건 검색되었습니다.

왜 소행성들을 관찰하는가?과학동아 l199201

only. There are probes that, we hope, will pass close by some asteroid and tell us more about it in a few moments than all the years we've been studying them from Earth.The ultimate question ab ...

우주수프과학동아 l199201

good soup is one of the great gifts of the gods.However, soup has been expanded as a term to include many other things than a good minestrone. For instance, it is possible that when the Earth w ...

과학평론과학동아 l199112

duckbill is really nothing like a duck's. The nostrils are located differently and it is a rubbery structure rather than a horny one like the duck's.The water in which the duckbill lives is inv ...

시라노 드 베르주락과학동아 l199112

(This is a vision of the airplane, but what Cyrano needed was a propeller in place of legs and curved wings rather than straight ones.)None of these six methods will work, you see, because the ...

여성 천문학자들과학동아 l199111

the "Henry Draper Catalogue," which eventually come to contain the spectral classification of 225,300 stars brighter than the ninth or 10th magnitude.In 1925, she became the first person ever t ...

대규모 탐색 작업과학동아 l199111

to know that we are possibly not living at the edge of destruction; that there are living beings more advanced than we are and yet who have avoided destroying themselves.There you are, then. We ...

식어가는 온천과학동아 l199110

that a simple drill hole into a geopressured zone would unleash a gusher of geothermal heat plus a quantity of methane, or natural gas.The years of research has reduced optimism in this respect ...

천랑성의 색깔과학동아 l199110

the "main sequence" category on a diagram that measures stars' absolute magnitude and surface temperature) for more than a billion years or so as compared with the sun's 10 billion.(C) 1991, Lo ...

더 밝은 물체과학동아 l199109

in trying to decide just how galaxies form. Some believe they form in "free fall" and come into existence in less than a billion years.Others believe that galaxies form over a longer time, seve ...

화산과학동아 l199109

the "Ring of Fire" - the circle of volcanic activity around the Pacific from Japan to Latin America. (A little more than a century ago, Darwin's second son suggested this Ring of Fire marked th ...

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