Suppose there existed a planet that went around the sun twice as fast as the earth. Then its orbital size as compared to that of the earth would be:

1. 0.63 times greater than that of earth.
2. 0.73 times smaller than that of earth.
3. 0.63 times smaller than that of earth.
4. 0.73 times greater than that of earth.

A Saturn year is 29.5 times the earth year. How far is Saturn from the sun if the earth is $1.5\times {10}^8 km$ away from the sun?
1. 2.01 × 10¹² m
2. 3.86 × 10¹² m
3. 1.43 × 10¹² m
4. 4.19 × 10¹² m