Weight and mass are related concepts in physics. When an astronaut with a mass of 80 kg goes to the Moon, where gravity is weaker, their weight decreases compared to Earth.
Weight refers to the gravitational force acting on an object, while mass is the measure of the amount of matter in an object. When an astronaut with a mass of 80 kg on Earth goes to the Moon, where the gravitational acceleration is 1.6 m/s², their weight decreases. So, the astronaut's weight on the Moon would be 80 kg * 1.6 m/s² = 128 N.
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