The kid astronomer in me jumps with glee as I explore the heavenly skies thru Google Earth. Yup, with about a hundred million stars and two hundred million galaxies, Sky in Google Earth lets you explore the heavens like never before.
Here’s a YouTube video of the product demo:
I wish we had this when I was just a kid. 
You can download Google Earth here.
I’ve been using Stellarium – http://www.stellarium.org
Google Earth is so astig!
I recently found this site, and I greatly like it.