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"Rock"(으)로 총 53건 검색되었습니다.
- 우주적 위험과학동아 l1990년 05호
- material from the moon could be compacted and layered on the outside of space vessels, giving them the protection of rock, though I don't know if that, too, could be saturated by cosmic rays.On ...
- 화성을 다시 찾다과학동아 l1990년 02호
- but remain exactly as they were when they landed.A few of the meteorites have the same composition as do the Moon rocks brought back by the astronauts. The feeling is that the bombardment of th ...
- 대 해빙과학동아 l1989년 12호
- water might have slowly settled down to the bottom of the ice-sheet, soaked into the ground till it reached bed-rock, and then slowly accumulated there. There would thus form what was essentia ...
- 20년후-달의 신비를 벗기며과학동아 l1989년 10호
- existed in its vicinity. These formed the numerous craters and the vast "seas" that now cover its surface. From the rocks we have brought back, we can study the different stages of that bombard ...
- 소행성의 근접신호과학동아 l1989년 08호
- miles, about twice the distance from the Earth to the moon. That sounds like a safe distance, of course.However, that rock is following an orbit that nearly crosses Earth's and every once in a ...
- 대기권 밖의 망원경과학동아 l1989년 04호
- twinkle, and blurring what we see. None of that will interfere with the Hubble space telescope. It will see everything rock-steady and point-sharp.What it amounts to, then, is that the telescop ...
- 태양계의 종말은?과학동아 l1988년 03호
- matter present won't produce enough total heat to melt the Earth. We might picture the Earth as a ball of indigestible rock and metal, circling amid the outermost wisps of gas of the sun. Even ...
- 시베리아에서 있은 폭발과학동아 l1988년 01호
- of icy materials-frozen water chiefly. As it raced through the atomsphere, air resistance would raise its temperature. Rock or metal would begin to glow and we would see a "shooting star." Ice, ...
- 우리의 옛 선조들과학동아 l1987년 12호
- and gorillas, live.) In Olduvai Gorge in East Africa, hominid skulls and primitive tools were discovered in rocks that surprised scientists by proving to be about 1.8 million years old. The hom ...
- 가장 중요한 화석과학동아 l1987년 11호
- that bones and feathers both made their impression on the rock at the same time. Hoyle now wants to take a pinhead of rock from the fossil and subject it to tests, but the museum will no ...
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