what is the moon's mass in kilograms
Type mass of moon into Google, and it tells you precisely :) 7.36 * 10 ^ 22 kg. That means 73,600,000,000,000,000,000,000kg. The e22 or the * 10 ^22 bits mean the same thing: take the number preceding them, and multiply by 10 to the power of 22. The reason it is used is because they're bloomin' big numbers!