How did the passion flower get its name? When the first Christian missionaries landed in South America in the sixteenth century, they found a plant which seemed to be a very good omen for the success of their mission. They called it the passion flower because they thought that it symbolised the death of Christ.
Astronauts actually grow 2 to 3 inches taller (5 to 8 centimeters) when they are in space! The stretching can cause them some pain; many astronauts have back pain while they are in space and the stretching can potentially injure nerves. Expedition 10 Crewmembers onboard the International Space Station.
R is the distance from the center of the Earth to the object in orbit. So, the object is falling towards the Earth, but just keeps missing the Earth. This is the real reason astronauts float inside the International Space Station (ISS) - they, and the vehicle are in free-fall. It isn't because there is zero gravity in space, as is often said. In fact, while the acceleration of gravity on the Earth surface is about 9.81 m/s^2, at the altitude of the ISS the acceleration of gravity has only dropped to about 8.75 m/s^2.