Astronauts feel weightless because their distance from the center of the earth is so great that their is very little gravitational pull on them. The greater the distance they are from the center of the earth, the less g is. Gravity is so much weaker up there because g decreases with altitude. The higher the altitude above the center of the earth, the less gravity there is.

Astronauts feel weightless because gravity IS weaker. The force pulling down is much less than that of the mass of the body and other objects

Astronauts feel weightless in space because there is no gravity. this has an effect on the normal force, which up there equals zero, making them weightless. there is no force holding them down and therefore no force exerted from the surface they would normally standing on.

Gravity is mush weaker in space, thats why the astronauts feel weightless. In order to have a weighted down feeling the astronaut needs to be within a certain radius of a significantly sized celestial body.

It is not a matter of gravity being weaker, but of there being no gravity.

In space they are too far away from the center of such a body (ie: the Earth, the Moon, the Sun). Gravity is still a las in space and is present, but are much less powerful when not near a body with its own significant gravitational pull.

Yes, because the further away you are from the earth, less gravity there is. the distance of the spacecraft from the surface of the earth is iversely proportional to the gravity of the spacecraft like what't illustrated in p.125 of the text book.

It is not that gravity is so much weaker it is that there is gravity pulling on you from all of the planets pulling on you. These gravities cancel each other out and you feel weightless. Gravity from the earth is less because of the distance between you and the earth.

Part of it is due to weaker gravity, but some of it is also due to centrifugal force.