Machine generated contents note: Rocket science 101 What is gravity? -- Project #1 Pencil eraser gravity simulator -- A history of space tourism, Part 2: Space trips for all! -- Rocket science 101 What is zero gravity? -- Project #2 Zero-G in a laundry basket -- Today's space fleet -- Rocket science 101 How do rockets work? -- Project #3 Newton's balloon test engine -- Liftoff in 5 4 3 2 1 -- Piloting a space plane -- Project #4 Launch a space vacation plane -- Green space tourism -- Space hotels -- Construction at 300 000 meters -- Project #5 Inflate a model space yacht -- Solar sails and resorts on Mars.
