1. How many meters are in a kilometer (km)?
2. How many meters are in a Gigameter (Gm)?
3. How many kilometers are in an Astronomical Unit (AU)?
4. How many kilometers are in one light year (LY)?
5. How many Astronomical Units are in a light year?
6. How many light years are in a parsec (pc)?
7. How many parsecs are in a Megaparsec (Mpc)?