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Measurements taken on the Moon would be compared to readings taken on Earth to arrive a relative measure of the Moon's gravity. [7] A handle at the top of the instrument facilitated manual carrying of the instrument and three feet on the bottom of the device allowed the device to be placed directly onto the Moon's regolith. [7]
Saturn: 60 000 Uranus: 25 400 Neptune: 24 300 Pluto: 2 500 Moon: 1 738 Moon's disk, ratio to Earth's equatorial radius: k = 0.272 5076 a e [19] Sun: 696 000 4 ...
This is smaller than the largest natural satellite that is known not to be gravitationally rounded, Neptune VIII Proteus (radius 210 ± 7 km). Several of these were once in equilibrium but are no longer: these include Earth's moon [77] and all of the moons listed for Saturn apart from Titan and Rhea. [55]
[24]: 2-9 The mass was adjustable through the addition or removal of weights which would allow the experiment to both be tested in Earth gravity to prove out its functionality, and also be operated in lunar gravity without modification to the device. [6]: 5 [25] The measurement electronics were primarily driven by a trio of capacitor plates.
For example, if a TNO is incorrectly assumed to have a mass of 3.59 × 10 20 kg based on a radius of 350 km with a density of 2 g/cm 3 but is later discovered to have a radius of only 175 km with a density of 0.5 g/cm 3, its true mass would be only 1.12 × 10 19 kg.
The choice of solar mass, M ☉, as the basic unit for planetary mass comes directly from the calculations used to determine planetary mass.In the most precise case, that of the Earth itself, the mass is known in terms of solar masses to twelve significant figures: the same mass, in terms of kilograms or other Earth-based units, is only known to five significant figures, which is less than a ...
Titan, shrouded in a smog-like orange haze, is the only known world other than Earth exhibiting l. ... "Titan's seas are pulled by Saturn's massive gravity, just like our seas, and the tidal range ...
The Saturn-mass planet HD 149026 b has only two-thirds of Saturn's radius, so it may have a rock–ice core of 60 Earth masses or more. [39] CoRoT-20b has 4.24 times Jupiter's mass but a radius of only 0.84 that of Jupiter; it may have a metal core of 800 Earth masses if the heavy elements are concentrated in the core, or a core of 300 Earth ...