Many startups hope to use pressurized capsules and giant inflatable balloons to lift tourists into the stratosphere. CNBC interviewed three of them, France’s Zephalto, Florida’s Space Perspective and Arizona’s World View. Balloon rides won’t take passengers all the way into space, but the companies say passengers will be able to experience the “overview effect,” a common, highly emotional feeling that astronauts feel when they see Earth in the darkness of space Phenomenon.