Can artificial gravity be provided in spacecraft or a space station?
Artificial gravity is created by the centrifugal force produced by rotating the spacecraft. Hence, there is really no ‘up’ and ‘down’, but only ‘inwards’ and ‘outwards’ from the axis of rotation. Also the gravity is not uniform and increases as one moves away from the axis of rotation.
What is the difference between an astronaut and a cosmonaut?
Both words are from Greek, astronauts “Sailors among the stars” and cosmonauts meaning “Sailors of the universe”. Americans call their space explorers astronauts, and the Russians call their’s cosmonauts.