On the Abc Family show Greek what is the name of the astronomy charcter that max told casey at the end?

Last night on Greek i saw Max and Casey together at the planetarium at the end and when max told casey the story I forget the name of the constellation he was talking about. I really liked the story and want to know the name of the constellation. If you could let me know i'll love you forever! thanks

On the Abc Family show Greek what is the name of the astronomy charcter that max told casey at the end?
he was telling the story about how the constellation lyra got it's name