To determine which planet an object would weigh the most on, we can compare the estimated mass of each planet, as weight is directly proportional to mass when the radius of the planets is assumed to be similar.
Here are the estimated masses of the planets:
- Planet W: 6.4 × 10²³ kg
- Planet X: 3.3 × 10²³ kg
- Planet Y: 59.7 × 10²³ kg
- Planet Z: 48.7 × 10²³ kg
Comparing these values, Planet Y has the highest mass (59.7 × 10²³ kg), followed by Planet Z (48.7 × 10²³ kg), Planet W (6.4 × 10²³ kg), and then Planet X (3.3 × 10²³ kg).
Therefore, an object would weigh the most on Planet Y.