As every new feature it's to attract new customers even when the product it free.
weenie google epic google rainbow google google gravity google sphere google sky i don't know all of them but theirs a few.
it's blue plains a friend area to get it google password for sky blue plains
day+night day=sun+sky night=moon+sky moon=cheese+sky
It is only available for Android, and a part of Google Earth on the PC and Mac.
App Store
If you are not initiated you cant see it.
fire + sky
google mail
go onto google translate
You could Google it if you knew what the problem was, or the best option is to phone up Sky on : 08442 414414
At present only Android phones running Android OS 1.6 or higher support the Google Sky Map application. See related link below for more details.
One could find pictures of the sky on the internet website 'Curious Astro Cornell'. This site will give you a small image of the sky. The website "Google Sky" would also be helpful.