Mars has less gravity. My attempts to walk resulted in jumps and hops, which took me into the air.

VOA: special.2010.07.10

Newton proved his idea by measuring how much gravity force would be needed to keep the moon orbiting the Earth.

VOA: special.2011.06.01

This most recent collision with Jupiter brought attention to how the huge planet's gravity affects our solar system.

VOA: special.2009.08.25

All his movements were made against a force that could reach six times the power of gravity.

VOA: special.2010.07.07

After about an hour of being beyond the pull of Earth's gravity, Glenn reported he felt fine.

VOA: special.2009.06.17

There was a new system of liquid nitrogen to keep the pilot cool and to resist the crushing force of gravity at high speeds.

VOA: special.2010.07.07

Because of the gravity on Mars, spacesuits may have to be designed to be lighter than suits used in orbit or on the moon.

VOA: special.2011.04.06

They moved easily and quickly, because the moon's gravity is six times less than Earth's.

VOA: special.2009.07.15

HeLa cells have gone to the moon to test the effect of zero gravity.

VOA: special.2010.07.21

Scientists can observe what they believe to be dark matter only through its gravity.

VOA: special.2009.07.21

He quickly learns that gravity on Mars is much less than on Earth.

VOA: special.2010.07.17

These are all influenced by the gravity of the solar system's largest planet.

VOA: special.2011.02.09

They have found that lack of gravity has a severe effect on bones.

VOA: special.2009.03.10

Glenn explained later that at times it helped to be free of gravity.

VOA: special.2009.06.17