What's the app called for the droid where you can hold it up to the sky and it tells you all the constellation?

and what not? I just wanna know what it's called.What's the app called for the droid where you can hold it up to the sky and it tells you all the constellation?Google Skymap :D

Enjoy!What's the app called for the droid where you can hold it up to the sky and it tells you all the constellation?Google sky map