an the weight of the space probe on planet X.
The weight of the space probe on planet Y will be greater than the weight of the space probe on planet X.
Explanation: Weight is a measure of the force of gravity acting on an object, which is given by the formula weight = mass x gravity. Since both space probes have the same mass and are on different planets with different gravitational accelerations, the weight of the space probe on planet Y will be greater than the weight of the space probe on planet X.