Question

Q-what happen Two astronauts are floating in gravitational free space after having lost contact with their spaceship.

Answer 1

You should watch 'Gravity' movie. If two astronauts lose contact in free space and they cant see each other then its only upto luck that they will find each other. Best case would be Either they will be able to get back to their rocket. Otherwise They cannot talk to each other because sound cannot travel in vaccum. They will keep floating alive until they are out of oxygen or they come in contact directly with the heat wave from sun or get hit with the debris floating in the space.

Eventually they will die..because they cannot get back to earth.