Yay! He’s all ready for bed and couldn’t have made it back here on time without your help. But before you go, here’s a cool fact about our home planet, earth. 

The Earth is about 4.5 billion years old. It is the only planet known to have human life on it, so we have to use what we know about the earth to study and make observations on the other planets. This is called Comparative Planetology. Cool, huh? 

BLAST OFF!!!!!!!

Click here to return to Earth!