Mercury

Venus

Earth

Mars

Jupiter

Saturn

Uranus

Neptune

diameter (Earth=1)

0.382

0.949

1

0.532

11.209

9.44

4.007

3.883

Diameter (km)

4,878

12,104

12,756

6,787

142,800

120,000

51,118

49,528

mass (Earth=1)

0.055

0.815

1

0.107

318

95

15

17

mean distance from Sun (AU)

0.39

0.72

1

1.52

5.20

9.54

19.18

30.06

orbital period (Earth years)

0.24

0.62

1

1.88

11.86

29.46

84.01

164.8

eccentricity (e)

0.2056

0.0068

0.0167

0.0934

0.0483

0.0560

0.0461

0.0097

mean orbital velocity (km/sec)

47.89

35.03

29.79

24.13

13.06

9.64

6.81

5.43

rotation period (in Earth days)

58.65

-243 #

1

1.03

0.41

0.44

-0.72 #

0.72

inclination of axis (degrees)

0.0

177.4

23.45

23.98

3.08

26.73

97.92

28.8

mean temp at surface (C)

-180 to 430

465

-89 to 58

-82 to 0

-150

-170

-200

-210

gravity at equator (Earth=1)

0.38

0.9

1

0.38

2.64

0.93

0.89

1.12

escape velocity (km/sec)

4.25

10.36

11.18

5.02

59.54

35.49

21.29

23.71

mean density (water=1)

5.43

5.25

5.52

3.93

1.33

0.71

1.24

1.67

atmospheric composition

none

CO₂

N₂+O₂

CO₂

H₂+He

H₂+He

H₂+He

H₂+He

rings

no

no

no

no

yes

yes

yes

yes