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This list contains a selection of objects 50 and 99 km in radius (100 km to 199 km in average diameter). The listed objects currently include most objects in the asteroid belt and moons of the giant planets in this size range, but many newly discovered objects in the outer Solar System are missing, such as those included in the following ...
All planets listed are smaller than Earth and Venus, ... Mars: 0.5325 Shown for comparison ... Radius is in the range of 1.2 – 120 km. ...
22 km – diameter of Phobos, the larger moon of Mars; 27 km – height of Olympus Mons above the Mars reference level, [157] [158] the highest-known mountain of the Solar System; 30.8568 km – 1 picoparsec; 43 km – diameter difference of Earth's equatorial bulge; 66 km – diameter of Naiad, the innermost of Neptune's moons
According to the IAU's explicit count, there are eight planets in the Solar System; four terrestrial planets (Mercury, Venus, Earth, and Mars) and four giant planets, which can be divided further into two gas giants (Jupiter and Saturn) and two ice giants (Uranus and Neptune). When excluding the Sun, the four giant planets account for more than ...
The average thickness of the planet's crust is about 50 km, and it is no thicker than 125 kilometres (78 mi), [33] which is much thicker than Earth's crust which varies between 5 kilometres (3 mi) and 70 kilometres (43 mi). As a result, Mars' crust does not easily deform, as was shown by the recent radar map of the south polar ice cap which ...
Mars is rotating more quickly than it used to, according to data that NASA’s InSight lander collected on the red planet. ... (1,790 and 1,850 kilometers).
1995 photo of Mars showing approximate size of the polar caps. The planet Mars has two permanent polar ice caps of water ice and some dry ice (frozen carbon dioxide, CO 2).Above kilometer-thick layers of water ice permafrost, slabs of dry ice are deposited during a pole's winter, [1] [2] lying in continuous darkness, causing 25–30% of the atmosphere being deposited annually at either of the ...
Mars comes closer to Earth more than any other planet save Venus at its nearest—56 million km is the closest distance between Mars and Earth, whereas the closest Venus comes to Earth is 40 million km. Mars comes closest to Earth every other year, around the time of its opposition, when Earth is sweeping between the Sun and Mars. Extra-close ...