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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.
All planets listed are smaller than Earth and Venus, ... [12] Mars: 0.5325 Shown for comparison ... Radius is in the range of 1.2 – 120 km. ...
Mars may have yet-undiscovered moons, smaller than 50 to 100 metres (160 to 330 ft) in diameter, and a dust ring is predicted to exist between Phobos and Deimos. [ 203 ] A third possibility for their origin as satellites of Mars is the involvement of a third body or a type of impact disruption.
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 ...
12.000 Mm – diameter of Sirius B, a white dwarf [166] 12.104 Mm – diameter of Venus; 12.742 Mm – diameter of Earth; 12.900 Mm – minimum distance of the meteoroid 2004 FU 162 from the centre of Earth on 31 March 2004, closest on record; 14.000 Mm – smallest diameter of Jupiter's Great Red Spot; 19.000 Mm – separation between Pluto ...
For two bodies, the parameter may be expressed as G(m 1 + m 2), or as GM when one body is much larger than the other: = (+). For several objects in the Solar System, the value of μ is known to greater accuracy than either G or M. The SI unit of the standard gravitational parameter is m 3 ⋅s −2.
But the U.S. space agency NASA, for instance, is developing capabilities needed to send people to Mars in the 2030s. "Mars is really far away. A flight now would take about nine months.
As if k 2 is smaller than 0.10 a solid core would be indicated, this tells that at least the outer core is liquid on Mars, [31] and the predicted core radius is 1520–1840 km. [31] However, current radio tracking data from MGS, ODY and MRO does not allow the effect of phase lag on the tides to be detected because it is too weak and needs more ...