摘要:

An object that the Pioneer spacecraft almost collided with during its flyby of Saturn on September 1 of this year is most likely the suspected 11 th moon originally discovered in a 1966 photograph but not seen since then. Pictures of the object, as well as data from other experiments on the Pioneer spacecraft, are the basis for believing that the existence of the moon has now been confirmed. The object, dubbed ‘Pioneer Rock’ during the mission, has a diameter of 150–300 miles (241.4–482.8 km).The reason that the first interpretation of the moon's existence was not immediately accepted by all of the astronomy community is because the proposed orbit could be fit to other of Saturn's moons. Stephen M. Larsen and John W. Fountain, both research assistants at the University of Arizona's Lunar and Planetary Laboratory, who had done the original photographic analysis, failed to locate the moon because of Saturn's poor viewing position from earth since the 1966 photograph was taken. It turns out that satisfactory groundbased telescope observations of Saturn can be achieved only once every 13 years, at times when the rings are seen on edge and faint objects, such as this moon, are not o

ISSN:0002-8606    

DOI:10.1029/EO060i046p00786-01

年代:1979

数据来源: WILEY

摘要:

The National Oceanic and Atmospheric Administration (NOAA) has reported the discovery of an oil‐rich layer of water hundreds of miles long, hundreds of feet beneath the surface of the southwestern North Atlantic, estimated to contain at least a million tons of crude oil apparently from a natural oil‐seep in the ocean floor.While the oil is too dispersed to be recovered for energy uses, the discovery could force drastic revisions in estimates of how much oil is naturally present in the sea. The oil layer appears to contain nearly twice the amount used by many scientists—0.6 million tons—to describe the amount of oil annually leaked into the global ocean from all natural

ISSN:0002-8606    

DOI:10.1029/EO060i046p00787

年代:1979

数据来源: WILEY

摘要:

On the invitation of the Indian Space Research Organization (ISRO), the Indian National Science Academy, and the Indian National Committee on Space Research (Incospar), COSPAR held its 22nd Plenary Meeting, along with four symposia and a workshop, in Bangalore, India, during the period May 29–June 9, 1979.COSPAR was honored by Morarji Desai, prime minister of India, and also the Minister of Space, who opened the meetin

ISSN:0002-8606    

DOI:10.1029/EO060i046p00798

年代:1979

数据来源: WILEY

ISSN:0002-8606    

DOI:10.1029/EO060i046p00806

年代:1979

数据来源: WILEY