To determine which planet an object would weigh the most, we need to consider the mass of each planet. Weight is directly proportional to the mass of the planet when the radius is assumed to be similar.
Here are the estimated masses:
- Planet W: 6.4 x 10^23 kg
- Planet X: 3.3 x 10^23 kg
- Planet Y: 59.7 x 10^23 kg
- Planet Z: 48.7 x 10^23 kg
The planet with the highest mass is Planet Y, with an estimated mass of 59.7 x 10^23 kg.
Therefore, an object would weigh the most on planet Y.