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1. |
Stardust memories |
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Eos, Transactions American Geophysical Union,
Volume 63,
Issue 12,
1982,
Page 201-201
Stuart Wier,
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摘要:
The discovery of large numbers of meteorites on the ice sheets of Antarctica during the past several years recalls a passage in the book,Wind, Sand and Stars,by Antoine de St. Exupéry (Reynal and Hitchcock, New York, 1939). St. Exupéry was a pioneer aviator and one of the finest French writers of this century. He possessed a remarkable sensitivity to the meaning of human life that is combined in his writings with observations of the physical world of great clarity. The passage isA minor accident had forced me down in the Rio de Oro region, in Spanish Africa. Landing on one of those table‐lands of the Sahara which fall away steeply at the sides, I found myself on the flat top of the frustrum of a cone, an isolated vestige of a plateau that had crumbled round the edges. In this part of the Sahara such truncated cones are visible from the air every hundred miles or so, their smooth surfaces always at about the same altitude above the desert and their geologic substance always identical. The surface sand is composed of minute and distinct shells; but progressively as you dig along a vertical section, the shells become more fragmentary, tend to cohere, and at the base of the cone form a pure calcareous depo
ISSN:0002-8606
DOI:10.1029/EO063i012p00201-01
年代:1982
数据来源: WILEY
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2. |
Hearings on planetary budget |
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Eos, Transactions American Geophysical Union,
Volume 63,
Issue 12,
1982,
Page 202-202
Barbara T. Richman,
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摘要:
The proposed budget for the National Aeronautics and Space Administration (NASA) is ‘a disaster for planetary science and exploration,’ David Morrison, professor of astronomy at the University of Hawaii, told the Subcommittee on Space Science and Applications of the House Committee on Science and Technology. Morrison was one of six scientists and aerospace industry leaders to testify on February 25. From each, the message was clear: the planetary budget, as proposed by President Reagan (Eos,February 23, p. 169), is inadequate.The proposed cuts do the most damage to mission operations and research and data analysis, Morrison told the subcommittee. ‘A substantial fraction of the planetary program is now slated for termination, including spacecraft operations and data analysis that represent much of the scientific payoff from large previous investments,’
ISSN:0002-8606
DOI:10.1029/EO063i012p00202-01
年代:1982
数据来源: WILEY
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3. |
Early crustal genesis: A report of the Airlie House Meeting |
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Eos, Transactions American Geophysical Union,
Volume 63,
Issue 12,
1982,
Page 203-207
Lewis D. Ashwal,
Roger J. Phillips,
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PDF (311KB)
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摘要:
Over 100 scientists from seven countries met at Airlie House, Warrenton, Virginia, November 13–17, 1981, to discuss relevant scientific issues concerning the early evolution of the crusts of the terrestrial planets. The impetus for this meeting was twofold: to bring the planetary and Archean scientific communities together and to lay the framework for a long‐term multidisciplinary research project.The motivation for such a project stems from the fact that during the past several decades vast quantities of new data relevant to the origin and evolution of the planets have been acquired. As a result, a revolution has occurred in our approach to the evolution of crust‐mantle systems of planetary bodies, with the appreciation that all but the smallest bodies in the solar system probably underwent a period of extensive melting and differentiation during their first few hundred million years of exis
ISSN:0002-8606
DOI:10.1029/EO063i012p00203
年代:1982
数据来源: WILEY
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