To determine which planet an object would weigh the most on, we need to consider that weight is directly proportional to the mass of the planet. The more massive the planet, the stronger its gravitational pull, and therefore the greater the weight of the object on that planet.
Based on the estimated masses from the table:
- Planet W: \( 6.4 \times 10^{23} , \text{kg} \)
- Planet X: \( 3.3 \times 10^{23} , \text{kg} \)
- Planet Y: \( 59.7 \times 10^{23} , \text{kg} \)
- Planet Z: \( 48.7 \times 10^{23} , \text{kg} \)
Since Planet Y has the highest mass at \( 59.7 \times 10^{23} , \text{kg} \), an object would weigh the most on Planet Y.
So, the correct response is:
on planet Y