Free Republic

NASA and the ESA... about to start a study that will explore how artificial gravity might keep astronauts in good shape. Volunteers at the German Aerospace Center will spend 60 days in bed ... at an incline that will send blood away from their heads. Once a day, a "selection" of the subjects will take a spin in the Center's short-arm centrifuge in a bid to send blood back toward their legs. The scientists can tweak the intensity of the centrifugal force as well as decide whether to spin around a person's head or chest, but it's not clear just...

The only way to get gravity is with mass. The more mass, the more gravity you get. Without mass, you can’t have gravity. ... The force of gravity that we feel is actually just an acceleration towards the center of the Earth at 9.8 meters per second squared, or 1G. If you were in a spacecraft and it was accelerating away from Earth at a rate of 1G, it would feel exactly the same if you were standing on the ground. ... Want to fly to Jupiter? It would only take about 80 hours of acceleration, and then 80 hours...