by Katie Durgin-Bruce, M.S.
In this online unit, you will learn surprising facts about the solar system, like the fact that there are 13 planets—4 terrestrial ones, 4 gas giants, and 5 dwarf planets. You will also find out how mankind has used technology to explore our solar system, and to understand Earth's place within the solar system.
This unit requires the following books:
- 13 Planets: The Latest View of the Solar System by David Aguilar