it has weaker gravity than Earth
It has a gravity which is 0.4 times that of the Earth's.
It has much weaker gravity.
Venus has weaker gravity than Earth.
Uranus's surface gravity is weaker.
It is stronger.
There less gravity on Mercury than on Earth.
It has a gravity which is 0.4 times that of the Earth's.
stronger
Weaker. The gravity on the surface of Venus is about 8.87 meters per square second; for comparison, on Earth, the gravity is about 9.82 meters per square second.
Weaker, much weaker.
Weaker. Mercury is a teeny tiny planet.
weaker
It has much weaker gravity.
Weaker as it is smaller.
it is stronger
Venus has weaker gravity than Earth.
stronger