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It was once expected that any icy body larger than approximately 200 km in radius was likely to be in hydrostatic equilibrium (HE). [7] However, Ceres (r = 470 km) is the smallest body for which detailed measurements are consistent with hydrostatic equilibrium, [ 8 ] whereas Iapetus (r = 735 km) is the largest icy body that has been found to ...
2.326 Mm – diameter of the dwarf planet Eris, the largest trans-Neptunian object found to date; 2.376 Mm – diameter of Pluto; 2.707 Mm – diameter of Triton, largest moon of Neptune; 3.122 Mm – diameter of Europa, the smallest Galilean satellite of Jupiter; 3.476 Mm – diameter of Earth's Moon; 3.643 Mm – diameter of Io, a moon of Jupiter
The orbits of the Moon and planets are integrated numerically along with the orientation of the Moon called physical libration. [23] At the Moon's surface, the beam is about 6.5 kilometers (4.0 mi) wide [24] [i] and scientists liken the task of aiming the beam to using a rifle to hit a moving dime 3 kilometers (1.9 mi) away. The reflected light ...
The angular diameter of the Sun is about the same as that of the Moon. (The Sun's diameter is 400 times as large and its distance also; the Sun is 200,000 to 500,000 times as bright as the full Moon (figures vary), corresponding to an angular diameter ratio of 450 to 700, so a celestial body with a diameter of 2.5–4″ and the same brightness ...
The instantaneous Earth–Moon distance, or distance to the Moon, is the distance from the center of Earth to the center of the Moon. In contrast, the Lunar distance ( LD or Δ ⊕ L {\textstyle \Delta _{\oplus L}} ), or Earth–Moon characteristic distance , is a unit of measure in astronomy .
The largest possible apparent diameter of the Moon is the same 12% larger (as perigee versus apogee distances) than the smallest; the apparent area is 25% more and so is the amount of light it reflects toward Earth. The variance in the Moon's orbital distance corresponds with changes in its tangential and angular speeds, per Kepler's second law.
The Moon is Earth's only natural satellite. It orbits at an average distance of 384,400 km (238,900 mi), about 30 times the diameter of Earth. Tidal forces between Earth and the Moon have synchronized the Moon's orbital period (lunar month) with its rotation period at 29.5 Earth days, causing the same side of the Moon to always face Earth.
A 30-inch (76 cm) muskellunge will weigh about 8 pounds (3.6 kg), while a 40-inch (100 cm) muskellunge will weigh about 18 pounds (8.2 kg), so 33% longer length will more than double the weight. Determining if a system is scaling with allometry