잘못된 경종

과학동아 1990년 05호

examination showed that the report was mistaken.One more case. The great supernova of 1987 in the Greater Magellanic Cloud produced a neutron star that spun at a rate of 2,000 times a second. This put astronomers into a tizzy because they could not account for a spin so unusually rapid. But then it turned out that the observations were mistaken. The neutron star had not actually been seen ...

1990년대의 과학

과학동아 1990년 03호

"neutrino telescopes" so that we can spot supernovas as they occur even when they are hidden form optical view by dust clouds.Then, too, Voyager 2 showed us Uranus and Neptune in the 1980s, while Giotto sent back information on Halley's Comet. The 1990s will be the decade of Galileo, which will study Jupiter in greater detail than ever before, sending a probe into its atmosphere.The '80s saw ...

대기권 밖의 망원경

과학동아 1989년 04호

see comets at greater distances than Earth-bound telescopes can. It may give us new information about the vast comet cloud on the outskirts of the solar system, which some people think may be the source of cosmic bombardments that periodically bring about the extinction of most life on Earth.The most exciting thing of all, however, is the possibility of the unforeseen and the unexpected, ...

태양을 스쳐 지나가기

과학동아 1989년 01호

are smaller pieces that have been formed, pieces too small to detect until they get close enough to the sun to form clouds of vapor, and then they are invisible in the sun's glare.But mos there is a satellite called "Solar Maximum Mission" or, for short, "Solar Max," which is designed to study the neighborhood of the sun. It can do this because it possesses a "coronagraph" that blocks out the ...

행성군(群)

과학동아 1988년 11호

that this belief may be correct.The present conception of the manner in which stars are formed involves a large dust cloud that slowly condenses, turning as it does so faster and faster. The central part becomes a star, but the thinner material surrounding it eventually produces planets.In fact, such condensation can't help but produce planets near stars; our own solar system is an example of ...

우주의 비밀을 알려줄 폭발

과학동아 1988년 04호

burst of antineutrinos, if it is composed of antimatter. The supernova that was exploding in the Large Magellanic Cloud nearly a year ago sent 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 our solar system. They were neutrinos, so the Magellanic ...