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17. The aphelion and perihelion distances for the earth are 152.1 × 106 Km and 147.1...

17. The aphelion and perihelion distances for the earth are 152.1 × 106 Km and 147.1 × 106 Km. Calculate eccentricity.

18. Eccentricity for Mars is 0.094 and semi major axis “a” is 227.9 × 106 Km. Calculate the perihelion and aphelion distances.

19. Mercury has a semi-major axis length of 5.790905 X 1010 m and a semi-minor axis length of 5.667152 X1010 m. Calculate Mercury’s eccentricity to four significant digits.

20. The orbit of Europa around Jupiter have a2 = 4.5011 X 1011 and b2 = 4.5007 X 1011. Find the eccentricity of Europa to three decimal places.

21. When earth is at aphelion, it is 1.52100 X 108 km from the sun. When it is at perihelion, the earth is 1.47095 X 108 km from the sun. Find the eccentricity of earth’s orbit to three decimal places.
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