What is weightlessness ?

Why is weightlessness caused in a spaceraft?

What is meant by weightlessness ?

STATEMENT -1 : Weightlessness is observed in an artifical satellite and this weightlessness does not depend upon the height of satellite above Earth's surface. and STATEMENT -2 : Weightlessness is not observed upon moon because mass of moon is much larger than that of artificial satellite. The weight of a body upon moon is due to the gravitational pull of moon upon the body.

STATEMENT -1 : Weightlessness is observed in an artifical satellite and this weightlessness does not depend upon the height of satellite above Earth's surface. and STATEMENT -2 : Weightlessness is not observed upon moon because mass of moon is much larger than that of artificial satellite. The weight of a body upon moon is due to the gravitational pull of moon upon the body.

Why does an astronaut in a spacecraft feel weightlessness?