To determine which planet an object would weigh the most, we need to compare their estimated masses.
Given the estimated masses:
- Planet W: \(6.4 \times 10^{23}\) kg
- Planet X: \(3.3 \times 10^{23}\) kg
- Planet Y: \(59.7 \times 10^{23}\) kg
- Planet Z: \(48.7 \times 10^{23}\) kg
The weight of an object on a planet is directly proportional to the mass of the planet, assuming the radius is similar. Therefore, the planet with the highest mass will have the highest weight for an object.
From the values provided:
- Planet Y has the highest mass at \(59.7 \times 10^{23}\) kg.
Therefore, the object would weigh the most on planet Y.