Utilization of libration points for human exploration in the Sun–Earth–Moon system and beyond

2004 ◽  
Vol 55 (3-9) ◽  
pp. 687-700 ◽  
Author(s):  
Robert W Farquhar ◽  
David W Dunham ◽  
Yanping Guo ◽  
James V McAdams
1998 ◽  
Vol 35 (2) ◽  
pp. 191-198 ◽  
Author(s):  
Roby S. Wilson ◽  
Kathleen C. Howell

Author(s):  
Yuying Liang ◽  
Begoña Nicolás ◽  
Àngel Jorba
Keyword(s):  
The Sun ◽  

Author(s):  
L. V. Morrison ◽  
F. R. Stephenson ◽  
C. Y. Hohenkerk ◽  
M. Zawilski

Historical reports of solar eclipses are added to our previous dataset (Stephenson et al. 2016 Proc. R. Soc. A 472 , 20160404 ( doi:10.1098/rspa.2016.0404 )) in order to refine our determination of centennial and longer-term changes since 720 BC in the rate of rotation of the Earth. The revised observed deceleration is −4.59 ± 0.08 × 10 −22  rad s −2 . By comparison the predicted tidal deceleration based on the conservation of angular momentum in the Sun–Earth–Moon system is −6.39 ± 0.03 × 10 −22  rad s −2 . These signify a mean accelerative component of +1.8 ± 0.1 × 10 −22  rad s −2 . There is also evidence of an oscillatory variation in the rate with a period of about 14 centuries.


1972 ◽  
Vol 47 ◽  
pp. 402-404
Author(s):  
E. L. Ruskol

According to the Radzievskij-Artemjev hypothesis of the ‘locked’ revolution of the circumplanetary swarms around the Sun, the initial Moon-to-Earth distance and the angular momentum acquired by the Earth through the accretion of the inner part of the swarm can be evaluated. Depending on the concentration of the density to the centre of the swarm we obtain the initial distance for a single protomoon in the range 15–26 Earth radii R and for a system of 3-4 protomoons in the range 3–78 R, if the outer boundary of the swarm equals to the radius of the Hill's sphere (235 R). The total angular momentum acquired by the primitive Earth-Moon system through the accretion of the swarm particles is ½–⅔ of its present value. The rest of it should be acquired from the direct accretion of interplanetary particles by the Earth. The contribution of satellite swarms into the rotation of other planets is relatively less.


1999 ◽  
Vol 63 (2) ◽  
pp. 189-196 ◽  
Author(s):  
A.A. Dzhumabayeva ◽  
A.L. Kunitsyn ◽  
A.T. Tuyakbayev

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