Download A new sun : the solar results from Skylab by John A. Eddy PDF

By John A. Eddy

"The highlights of the hot and intriguing photos of the sunlight as taken through Skylab astronauts are offered. subject matters of dialogue and images comprise: (1) the closest famous person; (2) the mask of the solar; (3) the sunlight from area; (4) the sunlight telescope on Skylab; and (5) the sun effects from Skylab - the quiet sunlight and the lively Sun."

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The dark lines of the spectrum and the spectrum itself gradually faded away; until all at once, as suddenly as a bursting rocket shoots out its stars, the whole field of view was filled with bright lines more numerous than one could count. The phenomenon was so sudden, so unexpected, and so wonderfully beautiful, as to force an involuntary exclamation. On his return to America, Young continued his studies of the spectrum of the chromosphere, first in the observatory of Dartmouth College and later in the clear high-altitude air of the Continental Divide.

TOTAL ECLIPSE of the Sun by the Moon is shown in this composite photograph. The Moon's motion across the face of the Sun is seen in sequence from left to right, as more and more of the Sun is covered. As the last bit of solar glare is blocked by the Moon (center), the dim outer atmosphere of the Sun flashes out, as the white corona. This "total phase" lasts but a few minutes. Soon the Moon's motion uncovers a thin crescent of bright Sun and in about another hour the spectacle is over. THE MASKS OF THE SUN 29 THE PINK CHROMOSPHERE flashes out from behind the Moon just as the last bit of the brighter Sun is covered at a total solar eclipse.

Data on the earlier parts of the graph are less reliable than in later periods. 12 A NEW SUN at the time of sunspot minimum very few are seen, and for periods as long as a month none can be found. The last maximum of the sunspot cycle was in 1968-69, and the one before that, which was particularly strong, was in 1957-58. The next should come in early 1980. The last minimum of sunspots was in 1976. Skylab took its observations of the Sun in the declining phase of the sunspot cycle, as the number of spots decreased toward the 1976 minimum.

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