A Possible Interpretation to Venusian Rotation Evolution

In this paper, the author estimated the long acceleration of Venusain rotation caused by theboth torques, the New of the solar gravitation tide, and the Fatmo of the zonal wind of atmospheric circulation of Venus which has been measured by the Pioneer Venus and Venera probes. Taking the Primordial period of anticlockwise rotation of Venus T₀ = 15 hours, the quality factor Q = 25.0, the latitude range of the atmospheric circulation is equal to ±70°, and the data of the average wind speeds and the average atmospheric densities in different atmospheric stratification are taken from the height between 0 and 100km.Thus, the total rotation rate of Venus can be expressed as Ω(T) = 1293"+ δ·18560"sin (4.°58 T0/T)/ century², where δ_i= +1 for Venusian anticlockw ise rotation, δ_i =-1 for Venusian clockwise ro tation, T is the rotation period with unit of hour.It can be estimated that:(1)the time of evolution from quick anticlockwise rotation to the period of orbital motion today with same direction is aboutt1 = 38.5×10⁸ year;(2)changing from anticlockwise rotation with period of 224.7 days to 243 days clockwise today, the timet₂ is equal to 3.1×10⁷ year;(3)when theNew appreoximates to the Fatmo with opposite direction, the time will be estimated experimentally aboutt₃ = 10.4×10⁹ year.It is impossible to interpret the rotation evolution of Venus by using the New only.