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  • 1
    Electronic Resource
    Electronic Resource
    Odd Harmonics of the Earth's Gravitational Field (1961)
    [s.l.] : Nature Publishing Group
    Nature 190 (1961), S. 617-618 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Table 1. ORBITAL PARAMETERS Satellite a, Earth radii e i, radians Cp Vanguard I Transit IB Transit UA 1-3615 1-0871 1-1312 0-1903 0-0278 0-0309 0-5977 0-8949 1-1639 -0-00102 -0-00115 -0-00026 For our purposes, it is most convenient to express the perigee radius as a function of Qp, the latitude ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/190617a0
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Possible Use of Stonehenge (1972)
    [s.l.] : Nature Publishing Group
    Nature 239 (1972), S. 511-512 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In accounting for the Aubrey holes, we have considered only the original structure at Stonehenge, suggested by Atkinson5 to have been (a) the bank and ditch, which formed a circle broken by the entry way, (b) the 56 Aubrey holes named for their modern discoverer, which form a circle just inside the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/239511a0
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  • 3
    Electronic Resource
    Electronic Resource
    Astronomical evidence concerning non-gravitational forces in the Earth-Moon system (1972)
    Springer
    Astrophysics and space science 16 (1972), S. 179-200 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The most conspicuous effects of non-gravitational forces in the Earth-Moon system are the accelerations of the Earth's spin and of the Moon's mean angular velocity. Evidence indicates that the present acceleration of the Moon is between −20 and −52 s of arc per century per century and that the present average acceleration of the Earth is between −5 and −23 parts in 109 per century. Over the past 2000 yr, the average for the Moon has been about −42 s per century per century and for the Earth has been about −28 parts in 109 per century; these values are probably correct within 10%. Evidence that does not involve any assumptions about the present values shows strongly that there was a ‘square wave’ in the accelerations that lasted from about 700–1300, and that the accelerations were different by a factor of perhaps 5 during the time of this wave from what they were at neighboring times. An effect that seems to be changing the obliquity of the ecliptic has been reported in recent literature, on the basis of data obtained within the past century. The effect amounts to about 1/4 s of arc per century if it is real. Older data are not accurate enough to give information about an effect this small. There are no satisfactory explanations of the accelerations. Existing theories of tidal friction are quite inadequate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00642733
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    Paper (German National Licenses)
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