d라이브러리
"NOT"(으)로 총 257건 검색되었습니다.
- 물이 많아지고 더워진다과학동아 l1989년 02호
- That means that some of the carbon dioxide it now holds in solution will act to warm the Earth still further.This is not a new discovery that has suddenly been made in 1988. Scientsts have tho ...
- 태양을 스쳐 지나가기과학동아 l1989년 01호
- 태양계에 있는 어떤 천체가 당할수 있는 최악의 재난은 태양과 부딪치는 것이다. 최근까지 과학자들은 이런 재난이 일어나는 것을 본적이 없다. 그러나 그런 광염( ... solar system is left to itself, true planets with nearly circular orbits, like the Earth, are quite safe. T ...
- 우주여행의 방향은?과학동아 l1989년 01호
- the space station, the parts could be brought, out of which new space vessels can be built. The intact vessels could not be lifted off Earth without vast rocketry, but the parts could ve brough ...
- 우주 오염과학동아 l1988년 12호
- must be made more massive and therfore more expensive to launch. And what about spacesuits and spaceships? They are not 100 percent safe either. It is possible that in 100 years, it simply woun ...
- 행성군(群)과학동아 l1988년 11호
- 지금까지 거의 반세기 동안, 천문학자들은 행성들이 보편적이며, 대부분의 또는 모든 항성들에 수반된다고 믿어왔다. 이것은 특히 우리의 태양처럼 주위에 반 ... common, than, very occasionally, intelligent life-forms may develop and produce technolgical civilizations, so ...
- 한쪽으로 늘어진 위성과학동아 l1988년 11호
- half the surface?A year from now, Voyager 2 will pass within 3 million miles of Nereid. This world may turn out to be another two-toned satellite and perhaps it will give us hints as to how it ...
- 동요하는 지구과학동아 l1988년 10호
- time to time. Usually, this is a result of a large earthquake, which shifts the balance of rocks inside the Earth- not much, but just enough to put a kink in Earth rotation that slowly shifts t ...
- 꿈이 현실로 되다과학동아 l1988년 10호
- of the benzene problem, which con sumed all his thoughts.He fell into a doze and even while sleeping, the problem did not leave him. He dreamed about chains of carbon atoms, twisting this way a ...
- 번개와 생명과학동아 l1988년 09호
- Human-made acid rain contains sulfuric acid as well as nitric acid. Sulfuric acid is particularly harmful and is not a component of lightning acid rain.In addition, human-made acid rain is con ...
- 다이아몬드 개량과학동아 l1988년 09호
- arrangement of the carbon atoms that seems to make a film that is even harder than ordinary diamond. They are not sure what the distortion is or why it should make diamond even harder, but if t ...
이전1920212223242526 다음
