See the link below for a the requirements to the extraterrestrial assignment:
https://docs.google.com/presentation/d/1GxVnKcdmBamoU95GJfwYAVv3VnmfDeXEgnG13DKZiuM/edit?usp=sharing
Assignment worksheet:
https://docs.google.com/document/d/1q9jAdko3pcWQ28dNKPSAew3Sv7Goez0wHOcw2ujg0Tw/edit?usp=sharing