they play football
Ski equipment is no way related to astronauts.
they use normal exercise machines like the bike and bench press.But these things must be able to float in a way so not to damage the equipment on the outside of the craft.
yes
It was Apollo 13 on the way to the moon when it exploded.You can also say Apollo 1 which hasd a fire, killing three astronauts.
NO, they died halve way!+
Astronauts are, if you like putting it this way, 'space people'. They fly in rockets and shoot to outer space and study it up there.
exercise
They are in a state of weightlessness caused be the distance from earth. This is because of one of 2 reasons. If the space craft is in a orbit around the planet, the weightlessness is caused by a constant falling towards the planet, but always misses the ground (you can get the same effect if you are inside an airplane dropping towards earth with more the 9.82m/s). If the spacecraft have left the earth gravity alltogether, there are simply no force pulling the astronauts downwards, making them seem to float. Gravity is caused by the fact that materia bend the time/space field in a way that matter is drawn towards one another. You need a very big mass for this affect to be noticeable though, like for example, the mass of Earth on a person.
Challenger and Columbia shuttles killed 14 astronauts but they were not destined for the Moon. The Space Shuttle only ever orbits the Earth. 3 Apollo 1 astronauts were killed on the launch pad when their cabin caught fire after a spark ignited the oxygen atmosphere they were breathing. No Apollo astronauts were killed after this disaster. Apollo 13 on it's way to the Moon came close but they managed to get all three home.
There is no such thing as a zero gravity chamber. The only way to experience weightlessness is in freefall. There are planes that you can board which will go into dives up to 30 seconds long. During these dives the planes are in freefall. Since you are falling at the same rate as the plane is, you will seem to float around the cabin and will feel weightless. It is the same reason that astronauts in orbit are weightless.
weightless
Increase your metabolic rate. The only way to do this is with exercise. Exercise aerobically to hit your cardiac target rate at least three times a week.