1. Suppose a planet orbits a star at the same distance as Earth (1 AU) but with a period of roughly 200 Earth days. The mass of the central star is: a. less than the mass of our sun, b. the same as the mass of our sun, c. greater than the mass of our sun, d. impossible to determine without knowing the mass of the planet.
Use this information for the next three questions: Mercury's eccentricity is 0.2. Its distance from the sun is 4.6 x 10^7 km at perihelion and 7.0 x 10^7 km at aphelion.
2. Determine the length of the semimajor axis in order to specify the orbit: a. 9.2 x 10^7 km, b. 1.16 x 10^8 km, c. 1.40 x 10^8 km, d. 5.8 x 10^7 km.
3. How far is the sun from the center of the orbit? The letter c represents this distance for an orbit: a. 3.5 x 10^7 km, b. 4.6 x 10^7 km, c. 2.4 x 10^7 km, d. 1.2 x 10^7 km.
4. Earth's perihelion distance is 1.47 x 10^8 km, and its aphelion distance is 1.52 x 10^8 km. How does c for