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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.
Venus's equator rotates at 6.52 km/h (4.05 mph), whereas Earth's rotates at 1,674.4 km/h (1,040.4 mph). [ note 2 ] [ 153 ] Venus's rotation period measured with Magellan spacecraft data over a 500-day period is smaller than the rotation period measured during the 16-year period between the Magellan spacecraft and Venus Express visits, with a ...
Venus is similar to Earth in size and density, and so probably also in bulk composition, but it does not have a significant magnetic field. [ 7 ] : 1729–1730 Earth's magnetic field is produced by what is known as the core dynamo , consisting of an electrically conducting liquid, the nickel-iron outer core that rotates and is convecting .
They make up a small area on Venus's global surface of around 7.2 x 10 8 km 2. [13] The lineament is the pattern of deformation, which make it a typical structural–material unit. [13] There is evidence showing the embayment of tessera by pdl's material in some tessera margins. Thus, it is possible that this unit is younger than the tessera ...
The ionosphere of Venus consists of three layers: v1 between 120 and 130 km, v2 between 140 and 160 km and v3 between 200 and 250 km. [28] There may be an additional layer near 180 km. The maximum electron volume density (number of electrons in a unit of volume) of 3 × 10 11 m −3 is reached in the v2 layer near the subsolar point. [28]
Solar radius is a unit of distance used to express the size of stars in astronomy ... only known to about an accuracy of ± 100–200 km). ... Venus: 0.00869 6,051.8 ...
[1] [2] The low eccentricity and comparatively small size of its orbit give Venus the least range in distance between perihelion and aphelion of the planets: 1.46 million km. The planet orbits the Sun once every 225 days [ 3 ] and travels 4.54 au (679,000,000 km; 422,000,000 mi) in doing so, [ 4 ] giving an average orbital speed of 35 km/s ...
It is sometimes called Earth's "sister planet" due to their similar size, gravity, and bulk composition (Venus is both the closest planet to Earth and the planet closest in size to Earth). The surface of Venus is covered by a dense atmosphere and presents clear evidence of former violent volcanic activity.