Why do astronauts in space feel no gravity?
A) There is no gravity out in space.
B) Gravity only happens when objects are accelerating.
C) In space, the gravity from the Moon and the Sun cancels out the Earth's gravity.
D) They and their spaceship are both freely falling at the same rate in the gravitational field.
E) The astronauts do not have any mass when they are out in space.
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