There are eight planets and a large number of smaller objects orbiting the Sun. (Exactly which bodies should be classified as planets and which as “smaller objects” has been the source of some controversy, but in the end it is really only a matter of definition. Pluto is no longer officially a planet but it is kept here for history’s sake.)
| The Sun’s Satellites
|
| Planet
планеты
| Distance
(000 km)
расстояние до солнца
| Radius
(km)
радиус
| Average orbital speed
(km/s)
средняя орбитальная скорость
| Orbital period
(days/ years)
орбитальный период
| Mass (kg)
масса
| Equatorial rotation velocity
(km/s or km/h)
скорость вращения
| Mean density
(g/cm³)
средняя плотность
|
| Mercury
| 57 910
|
| 47.87 km/s
| 87.9691 days
0.240846 yr
| 3.30e23
| 10.892 km/h
| 5.427 g/cm³
|
| Venus
| 108 200
|
| 35.02 km/s
| 224.70069 days
0.6151970 yr
| 4.87e24
| 6.52 km/h
| 5.204 g/cm³
|
| Earth
| 149 600
|
| 29.783 km/s
107 218 km/h
| 365.256366
days
1.0000175 yr
| 5.98e24
| 465.11 m/s
1674.396 km/h
| 5.5153 g/cm³
|
| Mars
| 227 940
|
| 24.077 km/s
| 686.9600 days
1.8820821 yr
| 6.42e23
| 868.22 km/h
| 3.934 g/cm³
|
| Jupiter
| 778 330
|
| 13.07 km/s
| 4331.572days
11.85920yr
| 1.90e27
| 12.6 km/s
45 300 km/h
| 1.326 g/cm³
|
| Saturn
| 1 426 940
|
| 9.69 km/s
| 10832.327 days
29.657296 yr
| 5.69e26
| 9.87 km/s
35 500 km/h
| 0.687 g/cm³
(less than water)
|
| Uranus
| 2 870 990
|
| 6.81 km/s
| 30.799.095
days
84.323326 yr
| 8.69e25
| 2.59 km/s
9 320 km/h
| 1.27 g/cm³
|
| Neptune
| 4 497 070
|
| 5.43 km/s
| 60.190 000 days
164.79 years
| 1.02e26
| 2.68 km/s
9 660 km/h
| 1.638 g/cm³
|
| Pluto
| 5 913 520
|
| 4.666 km/s
| 90 613.3055 days
248.09 yr
| 1.31e22
| 47.18 km/h
| 2.03 ± 0.06 g/cm³
|
4.87e24 = four point eighty seven times ten to the power of twenty four.
