List of Gravitationally Rounded Objects of The Solar System - Planets

Planets

Key
*
terrestrial planet		 °
gas giant

Planets both are large enough to have achieved hydrostatic equilibrium and have cleared their neighborhoods of similar objects. There are four terrestrial planets and four gas giants in the Solar System. The latter combined comprise more than 99 percent of the mass in the Solar System excluding that of the Sun.

*Mercury *Venus *Earth *Mars °Jupiter °Saturn °Uranus °Neptune
Astronomical symbol
Mean distance
from Sun		 km
AU		 57,909,175
0.38709893		 108,208,930
0.72333199		 149,597,890
1.00000011		 227,936,640
1.52366231		 778,412,010
5.20336301		 1,426,725,400
9.53707032		 2,870,972,200
19.19126393		 4,498,252,900
30.06896348
Equatorial radius km
:E		 2,439.64
0.3825		 6,051.59
0.9488		 6,378.1
1		 3,397.00
0.53226		 71,492.68
11.209		 60,267.14
9.449		 25,557.25
4.007		 24,766.36
3.883
Surface area km²
:E		 75,000,000
0.1471		 460,000,000
0.9010		 510,000,000
1		 140,000,000
0.2745		 64,000,000,000
125.5		 44,000,000,000
86.27		 8,100,000,000
15.88		 7,700,000,000
15.10
Volume km3
:E		 6.083×1010
0.056		 9.28×1011
0.87		 1.083×1012
1		 1.6318×1011
0.151		 1.431×1015
1,321.3		 8.27×1014
763.59		 6.834×1013
63.086		 6.254×1013
57.74
Mass kg
:E		 3.302×1023
0.055		 4.8690×1024
0.815		 5.9742×1024
1		 6.4191×1023
0.107		 1.8987×1027
318		 5.6851×1026
95		 8.6849×1025
14		 1.0244×1026
17
Density g/cm3 5.43 5.24 5.515 3.940 1.33 0.70 1.30 1.76
Equatorial gravity m/s2 3.70 8.87 9.81 3.71 23.12 10.44 8.69 11.00
Escape velocity km/s 4.25 10.36 11.18 5.02 59.54 35.49 21.29 23.71
Rotation period days 58.646225 −243.0187 0.99726968 1.02595675 0.41354 0.44401 −0.71833 0.67125
Orbital period years 0.2408467 0.61519726 1.0000174 1.8808476 11.862615 29.447498 84.016846 164.79132
Mean orbital speed km/s 47.8725 35.0214 29.7859 24.1309 13.0697 9.6724 6.8352 5.4778
Eccentricity 0.20563069 0.00677323 0.01671022 0.09341233 0.04839266 0.05415060 0.04716771 0.00858587
Inclination deg. 7.00 3.39 0 1.85 1.31 2.48 0.76 1.77
Axial tilt deg. 0.0 177.3 23.44 25.19 3.12 26.73 97.86 29.58
Mean surface temperature K 440–100 730 287 227 152 134 76 72
Mean air temperature K 288 165 135 76 73
Atmospheric composition He Na+ P+ CO2 N2 N2 O2 CO2 N2 Ar H2 He H2 He H2 He CH4 H2 He CH4
Number of known moons 0 0 1 2 66 or 67 62 27 13
Rings? No No No No Yes Yes Yes Yes
Planetary discriminant 9.1×104 1.35×106 1.7×106 1.8×105 6.25×105 1.9×105 2.9×104 2.4×104

Read more about this topic:  List Of Gravitationally Rounded Objects Of The Solar System

Famous quotes containing the word planets:

    “Why are all these dolls falling out of the sky?
    Was there a father?
    Or have the planets cut holes in their nets
    and let our childhood out,
    or are we the dolls themselves,
    born but never fed?”
    —Anne Sexton (1928–1974)

    “Perhaps when distant people on other planets pick up some wave-length of ours all they hear is a continuous scream.”
    —Iris Murdoch (b. 1919)

    “I would sell my life to avoid
    the pain that begins in the crib
    with its bars or perhaps
    with your first breath
    when the planets drill
    your future into you....”
    —Anne Sexton (1928–1974)