That's no moon...it's a space station.

More from Star Wars: Episode IV - A New Hope

• A long time ago in a galaxy far, far away...
• Hang in tight. You've got to come back. You wouldn't want my life to be boring, would you?
• Don’t be too proud of this technological terror you’ve constructed. The ability to destroy a planet is insignificant next to the power of the Force.
• I find your lack of faith disturbing.
• I've been waiting for you, Obi Wan. We meet again at last. The circle is now complete. When I left you, I was but the learner; now I am the Master.
• Oota-goota, Solo.