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FPC
Our Solar System
Name ______________________________
Period _____ Date ___________________
Answer the following questions, using the planetary data at the bottom of the page.
1. Which of the planets has the largest equatorial diameter?
2. Which of the planets has the greatest density?
The smallest?
The least?
3. Which of the planets would float in an ocean if we had a large enough ocean?
4. Do you notice a general pattern in the densities of the planets? Explain.
5. Which planet has the greatest tilt?
The least?
6. Which planet spins on its axis the fastest?
The slowest?
7. Which planet takes the longest time to travel around the sun?
The shortest time?
8. Which planet has the most observed satellites?
9. Which of the planets are perfectly spherical?
10. Which one of the planets is the most “flattened”?
TABLE 16-1 Planet Data
Mean distance from the SUN
(AU)1
Sidereal period of orbit (years)
Mean orbital velocity (km/s)
Equatorial radius (km)
Polar radius (km)
Mass of planet (Earth = 1)3
3
Mercury
Venus2
Earth
Mars
Jupiter
Saturn
Uranus
Neptune
Pluto4
0.387
.24
47.89
2439
same
.723
.62
35.04
6052
same
1
1
29.79
6378
6357
1.524
1.88
24.14
3397
3380
5.202
11.86
13.06
71492
66854
9.555
29.46
9.64
60268
54360
19.218
84.01
6.81
25559
24973
30.109
164.79
5.43
24764
24340
39.439
247.68
4.74
1140
same
0.06
5.44
.82
5.25
1
5.52
0.11
3.94
317.89
1.33
95.18
0.69
14.54
1.27
17.15
1.64
0.002
2.0
Mean density (gm/cm )
Body rotation period (hours)
1408
5832.R
23.93 24.62 9.92
10.66
17.24
16.11
153.3
Tilt of equator to orbit
(degrees)
0
2.12
23.45 23.98 3.08
26.73
97.92
28.8
96
Number of observed satellites
0
0
1
2
67
62
27
14
5
1
AU indicates one astronomical unit, defined as the mean distance between the Earth and the sun ( 1.495 x 10 8 km).
2
R indicates that planet rotation is retrograde (opposite to the planet’s orbit).
3
Earth’s mass is approximately 5.976 x 1026 grams.
Source: Boyce, J. M., and Maxwell, T. 1992. Our Solar System. Washington, DC: NASA, Publication NP 157.
4
Pluto was demoted to a dwarf planet in 2006.
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