Use the given information to complete parts 1 and 2. In your final answer, include all calculations. Planet Earth has an approximate diameter of 1.2742 times 10^10 millimeters. The sun has a diameter of 1.391 times 10^6 kilometers.

Part 1: Given that, for every one kilometer there are 1,000,000 millimeters, which of the unit measurement should be used to best represent the lengths of the sun and Earth’s diameters?

Part 2: Approximate how many times greater the sun’s diameter is than planet Earth’s.