There may very well be hundreds of other planets in other solar systems that are inhabited by intelligent life that is completely different from us. (religion.blogs.cnn.com)
The more we learn about the structure of other solar systems, the more we learn about the formation of our planets. (science.howstuffworks.com)
That is unlike any asteroid or comet observed in our solar system to date, and may provide new clues into how other solar systems formed. (jpl.nasa.gov)