Part A: An astronomical unit (AU) is the average distance between Earth and the sun. One AU is equal to approximately 150,000,000 km. Astronomers also use light years to measure distance. A light year is approximately 9.5×10t to the power of 12 km.

Use scientific notation to rewrite the measure of one astronomical unit (1 AU) in kilometers.

Part B:
When measured in kilometers and shown in scientific notation, how many times greater is 1 light year than 1 astronomical unit? Explain your answer.