What is revolution how many time does a take for complete to revaluation?

How much rocket fuel do you need to get into space? Which planets are called inner planets and which are called outer planets? What must overcome by a rocket's thrust? Where and when does the Sun stay up 24 hours? When do you move the clock forward one hour 2011? What probes have you sent to Io? Can you be a doctor and have 10 kids at the same time? It's takes 365 14 days to orbit the earth? How cold is a cloud? Why would it be harder to breath at the top of a mountain? What is bigger than the moon? What would your life be like without light? How much does the Canadarm cost? How did the astrolabe make life easier? What is the main sequence phase of a star? Does Air exists in stratosphere zone? What was the first form of life on Mars? What year and date was Apollo born? How did the space race impact our lives today? What are two characteristics of the thermosphere that make it necessary for us to use a space shuttle to get through it?

What is revolution how many time does a take for complete to revaluation?