SPACE TRAVEL "How long would it take to travel to a newly found planet?" Dr. Marc Rayman Answers	ROVER CAMERAS "How are the camera lenses kept clear from the martian dust?" Jessica Collisson Answers	SATURN'S MOON TITAN "Why Does Saturn's moon Titan have a thicker atmosphere than Earth or Mars?" Dr. Candice Hansen Answers
We invite the public to email questions to JPL. Selected questions will be posted on the JPL Web site with a response from a scientist or engineer.