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"earth"(으)로 총 218건 검색되었습니다.- 자리 바뀐 섬과학동아 1988년 07호
- Columbus recorded its readings but the direction in which the compass needle points, as measured at a specific spot on Earth's surface, varies from year to year and we don't know exactly what t ...
- 윤초(閏秒)과학동아 1988년 06호
- is add-ed and the Earth is in sync again. When this system was started in 1972, 10 seconds were added to bring the Earth back into sync. In the 15 years since, 13 leap-seconds have had t ...
- 우리는 지금 몇 살인가?과학동아 1988년 06호
- sider Neanderthal man and modern man as different species again.Also, if Neanderthal man and modern man coexisted on Earth not for 5,000 years, but for 55,000 years, why should it have taken mo ...
- 성단(星団)이라는 측정자과학동아 1988년 05호
- of the universe and of what its ultimate destiny may be. The best way of determining a galaxy's distance from Earth is to detect a type of star in it called a "Cepheid variable." Its light grow ...
- 우주의 비밀을 알려줄 폭발과학동아 1988년 04호
- out such an enormous burst of trillions upon trillions upon trillions of particles, and 19 of them were detected on Earth. That was the first time any such particles were detected from beyond o ...
- 태양계의 종말은?과학동아 1988년 03호
- 결국 모든 것들은 최후를 맞아야만 한다. 여러분과 나, 인류 전체, 그리고 지구 그 자체까지도. 그러나 그 최후는 어떠할까? 과학자들은 그러한 일들에 관해 추측 ... stars. We will look back on Earth and sun in sorrow, but we may feel proud if we fragile human bein ...
- 가장 생명력이 강한 것과학동아 1988년 03호
- number than the total of all other species of life combined. In fact, about five out of every six species of life on Earth are insects.What's more, this only includes the life forms that are kn ...
- 가솔린 바다과학동아 1988년 02호
- of the worlds we can approach. (The moon has none of these elements, for instance, so lunar colonists will depend on Earth for their supply.) The distant outposts might therefore be thankful to ...
- 나무 달력과학동아 1988년 01호
- in mountainous areas of California and eastern Nevada. They are, it is believed, among the oldest living things on Earth. One of these pines was cored and found to contain 4,900 rings from cent ...
- 시베리아에서 있은 폭발과학동아 1988년 01호
- of rock about 250 feet across, or a lump of iron about 80 feet across. In either case, as it came speeding into the Earth at 20 milis a second or so, it would have done the damage of a large-si ...
