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Table
of Contents
The
Solar System
Planetary
Data
Terminology
Formation Theory Parameters
Magnetic Fields
Angular Momentum
Solar System Formation
Questions
Intro
to Astronomy
Misconceptions
Archaeoastronomy
Equitorial Coordinates
Understanding the Seasons
Time & Its Measurement
Telescopes
Solar
& Lunar Eclipses
The
Earth
The
Moon
Mecury,
Venus, Mars
The
Outer Planets
Solar
System Debris
The
Sun
Evolution
of Stars
Intersteller
Matter
Sky
Literacy
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Planetary Data
|
Planet
|
AU
|
Orbital Period Sid / Syn
|
i (degrees)
|
e
|
Rotation Period
|
Axial Tilt (degrees)
|
|
Mercury
|
0.39
|
88 d / 115.9 d
|
7.0
|
0.21
|
58.7 d
|
0.0
|
|
Venus
|
0.72
|
225 d / 583.9 d
|
3.4
|
0.01
|
243 d
|
178
|
|
Earth
|
1.00
|
365 d / ---
|
0.0
|
0.02
|
23.9 h
|
23.5
|
|
Mars
|
1.52
|
687 d / 779.9 d
|
1.9
|
0.09
|
24.6 h
|
24.0
|
|
Jupiter
|
5.20
|
11.9 y / 398.9 d
|
1.3
|
0.05
|
9.9 h
|
3.1
|
|
Saturn
|
9.54
|
29.5 y / 378.1 d
|
2.5
|
0.06
|
10.7 h
|
27
|
|
Uranus
|
19.2
|
84.0 y / 369.7 d
|
0.8
|
0.05
|
17.2 h
|
97.9
|
|
Neptune
|
30.1
|
165 y / 367.5 d
|
1.8
|
0.01
|
16.1 h
|
28.8
|
|
Pluto
|
39.4
|
248 y / 366.7 d
|
17.2
|
0.25
|
6.4d
|
118 ?
|
|
Planet
|
Mass (earth =1)
|
Radius (earth = 1)
|
Average Density (gm / cm³)
|
Surface Gravity
(earth = 1)
|
Number of Rings
|
Number of Satellites
|
|
Mercury
|
0.054
|
0.38
|
5.4
|
0.39
|
0
|
0
|
|
Venus
|
0.82
|
0.95
|
5.3
|
0.91
|
0
|
0
|
|
Earth
|
1
|
1
|
5.5
|
1
|
0
|
1
|
|
Mars
|
0.11
|
0.53
|
3.9
|
0.38
|
0
|
2
|
|
Jupiter
|
318
|
11.3
|
1.3
|
2.54
|
1
|
16+
|
|
Saturn
|
95.1
|
9.44
|
0.7
|
1.07
|
7
|
18+
|
|
Uranus
|
14.5
|
4.10
|
1.3
|
0.87
|
11
|
15+
|
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Neptune
|
17.2
|
3.88
|
1.6
|
1.14
|
4
|
8+
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Pluto
|
0.0025
|
0.18
|
2.0
|
0.06
|
0
|
1
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F = G x m1 x m2 / r² - Newton's Universal Gravity
L = (mr²)w - Angular Momentum
P² = kA³ - Kepler's Third Law
G = 6.67 x 10 ^ -8 dyne cm²/gm²
(m1 + m2) P² = (4 pi² / G) a³ - Newton's derivation of
Kepler's Third Law
Inferior Planet: 1/S = 1/P - 1 or 1/P = 1 + 1/S
Superior Planet: 1/S = 1 - 1/P or 1/P = 1 - 1/S
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