With the iOptron LiveStar Mini Planetarium, you and your family can experience the excitement of going to a planetarium right from inside your own home. The LiveStar Mini Planetarium is a globe (8.5" diameter) that projects the night sky right onto the ceiling and walls allowing you to explore the stars indoors. You'll be able to see the stars and constellations - even see the Milky Way. Plus, the planetarium rotates to mimic the motion of the night sky. Simple to set up and use - it provides a fun way to learn about astronomy.