The one-of-a-kind Star Sense enables automatic alignment of your Celestron computerised telescope. Just set up the accessory, push the Align button on the hand control, & Star Sense begins capturing & comparing images of the night sky against its internal database. In about three minutes, it's gathered enough information to triangulate its position & align itself. Then, press the Sky Tour button: Star Sense will automatically slew to all the best stars, planets, galaxies, & more currently visible in the night sky.