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d라이브러리

"earth"(으)로 총 187건 검색되었습니다.

낮과 밤의 리듬과학동아 l199301

full moon, when it would be too visible to predators like owls and snakes.Certainly the moon's cycle has an effect on Earth(the tides, for instance). While I don't believe that certain human be ...

맨틀과 핵과학동아 l199212

stuff collected outside as atmosphere while the heavy stuff mashed together forming the planet itself. This inside of Earth is a remarkable place, although it bears no resemblance to Jules Vern ...

'파이어니어'와의 안녕과학동아 l199212

shock impacts similar to the blast which felled trees in Tunguska, Siberia, on June 30, 1908.Unlike Mars, Venus and Earth are both planets with good-sized atmospheres. On Earth, water wi ...

Out Of The Sun 태양으로부터과학동아 l199211

(2) Neutrinos may be produced in the expected big quantities but only a few can be counted because on their way to Earth something happens to them.(3) The energy produced by nuclear fusion in t ...

Frog-And More In Space 우주공간에서의 개구리과학동아 l199211

as adults. Only 4,000 species of vertebrates, out of a total of 40,000, are amphibians, and all of them are small. On Earth today, amphibians are declining in numbers and some species are near ...

더 많은 복제과학동아 l199210

to be 63 percent similar to that of the most primitive yeast!) it probably goes back to early days of cellular life on earth. Other proteins controlling the various changes in the cell cycle ar ...

블랙 홀 탱고과학동아 l199210

hole.The latest black hole candidate found in our galaxy is in the binary system V404 Cygni, 5,000 light years from Earth. In 1938 a visible star there had gone nova, and in 1989 produced a bur ...

아라크네의 자식들과학동아 l199209

of animals are true "builders" — spiders, insects, birds and Homo sapiens sapiens. The latter came along late in Earth's history, building meager huts and such until they invented civilization, ...

1 우리도 우주산업시대 저궤도 위성에 눈을 돌려라과학동아 l199209

발상과는 비교도 되지 않을 만큼의 획기적 전환이 예견된다. 이는 '지구저궤도'(LEO, Low Earth Orbit)를 이용하자는 발상이다.정지 위성체에 비해 지구 표면에서 2백~2천㎞ 떨어진 궤도를 도는 위성체를 지구저궤도 위성체(LEO Satellite)라고 하는데, 이는 지구의 특정 지역에 있지 않고 지구를 13~14희 정도 ... ...

쓰레기과학동아 l199209

its load. Isaac once wrote a short story about the scorn aliens had for Terrans who disposed of their garbage on Earth instead of sending it off the planet. The back side of the moon is a big p ...

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