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General Information, Facts & Tables
[Solar System Data]

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Overview

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Our solar system contains nine major planets which revolve around the Sun. One method of remembering the planets and their order is by the mnemonic phrase "My Very Elderly Mother Just Sat Under the North Pole.
Note! This phrase does not include the Sun or the Earth's Moon.
 

Solar System Comparison Tables

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Distance
from Sun
(Gm)

Eccentricity
of Orbit
(0 - 1) *

Mean Orbital
Velocity
(km / s)

Inclination
of Orbit
(degrees º)

Orbital
Period
(Years)

Rotation
Period
(Days)

Inclination
of Equator
(degrees º)

Sun

-
-
220.0
-
-
~30   
-

Mercury

58
0.205
47.9
7.0
88.  
58.6 
0. 

Venus

108
0.007
35.0
3.4
224.7 
243.0 
177.4

Earth

150
0.017
29.8
0.0
365.25
1.0 
23.5

Moon

-
0.055
1.0
5.1
27.32
27.32
6.7

Mars

28
0.094
24.1
1.9
687.  
0.97
24.9

Jupiter

779
0.049
13.1
1.3
4 332.  
0.41
3.1

Saturn

1 433
0.057
9.7
2.5
10 749.3 
0.46
26.7

Uranus

2 872
0.046
6.8
0.8
84.01
0.71
97.8

Neptune

4 495
0.009
5.4
1.8
164.79
0.67
28.3

Pluto

5.910
0.249
4.7
17.2
248.  
0.26
122.5

  

 

Diameter at
Equator
(km)

Mass
(1020 kg)

Density
(kg / m3)

Specific
Gravity
(Earth = 1) 

Gravitational
Acceleration
(m / s)

Escape
Velocity
(km / s)

Mean Surface
Temperature
(ºC)

Sun

1 390 000
19 800 000
1 408
?
275. 
618.02
5 527

Mercury

4 879
3 300
5 472
0.378
3.7
4.3 
167

Venus

12 104
48 700
5 243
0.894
8.9
10.4 
464

Earth

12 756
59 700
5 515
1.000
9.8
11.2 
15

Moon

3 475
730
3 340
0.165
1.6
2.4 
-46

Mars

6 794
6 420
3 933
0.379
3.7
5.0 
-65

Jupiter

142 984
18 990 000
1 326
2.540
23.1
59.5 
-110

Saturn

120 536
5 680 000
687
1.070
9.0
35.5 
-140

Uranus

51 118
868 000
1 270
0.080
8.7
21.3 
-195

Neptune

49 528
1 020 000
1 638
1.200
0.6
23.5 
-200

Pluto

2 344
125
~2 000
?
0.21
1.1 
-225

? = Unknown * Value between 0 and 1 with 0 = circular and 1 = Elliptical
 

Satellites

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Mercury: None
Venus: None
Earth: Moon
Mars: Phobos, Deimos
Jupiter: >60 Largest include Callisto, Ganymede, Europa, Io.
Saturn: >31
Uranus: > 26
Neptune: > 13
Pluto: Charon.