“About 7 billion people live on Earth now. But Earth may become too crowded. Then what will we do?
       Today people can live and work in space stations. In the future we may build huge cities in space.
      Men have walked on the moon. In the future we may travel to other planets.
There may be life on other planets”.

Do you believe that people will live in space?
Where do you think they may build the first space settlement?
What do you know about the Solar System?
See for more information:  http://en.wikipedia.org/wiki/Solar_System