Here's why:

* Atmospheric Pressure: Venus has an atmospheric pressure at its surface that is 92 times that of Earth's. This means the weight of the air on Venus is incredibly heavy.

* Composition: The Venusian atmosphere is primarily composed of carbon dioxide (96.5%), with nitrogen making up the remaining 3.5%. This dense composition contributes to its immense weight.

While Jupiter is much larger than Venus, its atmosphere is significantly less dense. Even though Jupiter has a much thicker atmosphere in terms of depth, the lighter gases that make up its atmosphere result in a lower overall weight.