At first, free fall can feel like roaring down a hill in a roller coaster or one of those sudden-drop rides at amusement parks. But these rides are thrilling – and a little scary – because passengers can see the world whiz past them and the ground rush at their feet. Astronauts only see the inside of their spaceships or the distant Earth and stars outside the windows, so they don’t have any visual clues that they’re falling. To them, free fall feels as if gravity has switched off. The feeling can be disorienting – and a little sickening for some. Two-thirds of the passengers about NASA’s “Vomit Comet,’’ a plane that flies in slow dives to re-create weightlessness, toss their cookies during flight.
Picture Credit : Google
