1. All 71 amateur satellites have been launched from only eight sites.2. There are less than two dozen active satellite launch sites in the world.3. A number of countries have combined resources to build and launch rockets.4. A satellite launched due east will have an inclination equal to its latitude.5. It takes a great deal of energy to launch a satellite.6. Most launch sites are restricted in their launch direction by where the rocketstages fall.7. Satellites travel slower the further from the earth.8. Orbit plane changes require a great deal of energy.9. 97% ofa launch vehicles mass is fuel.10. There is very wide range of fees charged to launch rockets.
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