1)    Draw a few arrows on the orbital path to show the...

1)    Draw a few arrows on the orbital path to show the direction along which this planet is revolving around the sun

2)    Assuming that area A, B and C are all equal. Through which of the following distances would the planet move at its slowest velocity? Use Kepler's 2^nd law to explain answer   a-b, c-d or e-f. 

3)    It takes approximately 22.6 earth year for this planet to complete one circle of revolution around the sun. What is the average distance between this planet and the sun in million kilometers? Explain calculation

4)    The average daylight time on this planet is 15 hours. What is the period of rotation of this planet? Explain

5)    The thickness of the atmosphere for this planet is at least 100 times thicker than that of Earth's atmosphere. The density of this atmosphere, however, is barely 1/5 of Earth's density. Describe the mass and components (make-ups) of this unknown planet. Explain

6)  Is the escaping velocity for this planet greater or less than that of the earth? Explain. Why is the atmosphere of this unknown planet so many times thicker than that of the earth? Explain.

7)  The orbital velocity of this planet must be much higher/lower (circle one) than that of the Earth. A person must weigh more/less (circle one) on this planet than on the Earth. Explain

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Figure 3 shows the orbital path of an unknown planet (small circle on the orbital path) around the Sun (the circle in the center). Answer the following questions and use the data provided in Table 12-1 f Figure 3. Relative position of the sun and an unknown planet.

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Table 12-1. Planetary data of the solar system. Mean Distance from Sun Orbital Velocity Planet Millions Symbol AU Millions of Period of of Miles Inclination Kilometers Revolution of Orbit mi/s km/s Mercury 0.387 36 58 Venus 0.723 88d 700' 67 29.5 47.5 108 Earth 1.000 93 224.7d 3 24' 21.8 150 35.0 Mars 1.524 142 365.25d 0'00' 18.5 228 29.8 Jupiter 5.203 687d 14.9 483 1 51' 778 11.86yr 24.1 Saturn 9.539 886 1'18' 8.1 1427 Uranus 29.46yr 13.1 19.180 1783 2029' 6.0 2870 84yr 9.6 Neptune 30.060 2794 0 46' 4.2 4497 165yr 6.8 1046' 3.3 5.3 Period of Diameter Relative Average Polar Mean Number o Planet Rotation Mass Density Miles Kilometers (Earth = 1) Flattening (g/cm3) Temperature Known (%) (C) Satellites Mercury 59d 3015 4854 0.056 Venus 5.4 0.0 244d 7526 167 12,112 0.82 Earth 5.2 0.0 23h56 04S 7920 464 12,751 Mars 1.00 5.5 24h37m23s 0.3 4216 15 6788 0.108 Jupiter 3.9 HOO 9h50m 0.5 88,700 -65 143,000 2 317.87 1.3 Saturn 6.7 10h14m 75,000 -110 63 121,000 95.14 Uranus 0.7 10.4 17h14m 29,000 -140 47,000 56 Neptune 14.56 1.2 16h03m 2.3 28,900 -195 46,529 27 17.21 1.7 1.8 -200 13

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