Search results
Results from the WOW.Com Content Network
The sizes and masses of many of the moons of Jupiter and Saturn are fairly well known due to numerous observations and ... Earth I: 1 737.4 ... 145: 72 ± 1.5: 2.4 ...
Nineteen moons are large enough to be round, and two, Titan and Triton, have substantial atmospheres The number of moons discovered in each year until November 2019 Mercury , the smallest and innermost planet, has no moons, or at least none that can be detected to a diameter of 1.6 km (1.0 mi). [ 2 ]
The Earth–Moon system is a unique exception in the Solar System; at 3,474 kilometres (2,158 miles) across, the Moon is 0.273 times the diameter of Earth and about 1 ⁄ 80 of its mass. [4]
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.
This is because when the Moon first formed (which some scientists think may have taken only a few hours), it was only 5 percent as far from Earth as it is today at around 238,900 miles on average.
[37] [2] These discoveries brought Saturn's total number of confirmed moons up to 145, making it the first planet known to have over 100 moons. [37] [38] [39] Yet another moon, S/2006 S 20, was announced on 23 May 2023, bringing Saturn's total count moons to 146. [2]
The research builds on previously known ecological and metabolic theory which found that the ratio of carbon to nitrogen to phosphorus (C:N:P) was consistent across ocean biomass at 106:16:1.
Considering the Earth–Moon system as a binary planet, its centre of gravity is within Earth, about 4,671 km (2,902 miles) [24] or 73.3% of the Earth's radius from the centre of the Earth. This centre of gravity remains on the line between the centres of the Earth and Moon as the Earth completes its diurnal rotation.