The recent fly-by of Uranus by the Voyager 2 spacecraft provided a singular opportunity to measure one of the fundamental but poorly known physical properties of the planet, its intrinsic rotation period. Earth-based photometric and spectroscopic estimates of the 'atmospheric' period vary greatly, ...
For planets which are even further out, the motion around the Sun is even smaller and the time required to compensate for it is only a few seconds. For Jupiter the difference between the rotation period and the length of the day is about 3 seconds; and for Saturn, Uranus and Neptune, t...
The researchers hope to apply their method to other gaseous planets in the solar system such as Uranus and Neptune. Their new technique could also be applied in the future to study gaseous planets orbiting other stars.
valueofthedominatingperiodofthemaincentennialcycleof thismodelisdeterminedamong171.44a,178.7a(Josecycle),210aand230a(deVriescycle)bylooking fortheminimumresidualsofUT1,LOD,TSIandMSLapproximation. 1.INTRODUCTION Theirregularandlong-termvariationsoftheEarthrotationaremainlycausedbythedisplacements ofmatterindiff...
These wind velocities, however, assume solid-body rotation periods based on Voyager 2 measurements of periodic variations in the planets' radio signals and of fits to the planets' magnetic fields; 17.24 h and 16.11 h for Uranus and Neptune, respectively. The realization that the radio period of...
If Uranus and Neptune are assumed to be as similar in internal structure as they are in mass and radius, the rotation period for Neptune must be shorter than that for Uranus. It is suggested that the true rotation period is given by Neptune's oblateness, while the photometric period ...
Earth ; Earth rotation ; Gravity fields of the terrestrial planets ; Jupiter ; Mars ; Mars: gravity ; Mercury ; Moon: gravity ; Neptune ; Planet ; Planetary rotation ; Pluto ; Saturn ; Uranus ; Venus ; Venus: gravity
Earth ; Earth rotation ; Gravity fields of the terrestrial planets ; Jupiter ; Mars ; Mars: gravity ; Mercury ; Moon: gravity ; Neptune ; Planet ; Planetary rotation ; Pluto ; Saturn ; Uranus ; Venus ; Venus: gravity
InUranus: The interior …it to the speed of rotation, scientists can infer the density distribution inside the planet. For two planets with the same mass and bulk density, the planet with more of its mass concentrated close to the centre would be less flattened by rotation. Before the Voyage...