Far out, at the extremes of the solar system, orbits billions of icy, rocky bodies. These form the Kuiper Belt and Oort Cloud, and its where comets such as 67P/Churyumov-Gerasimenko (recently visited by the ESA Rosetta probe) came from.
----------------------------------
This app forms a companion to GCSE level Physics or Astronomy for Students and anyone interested in space.
An ideal revision aid or classroom demonstration, this app includes specially commissioned video, flash cars, and self-testing components.