system
Given the following post, respond as if you're commenting on Reddit:
human
Could an enclosed vacuum impart sufficient buoyancy to overcome earth's gravity?

Given current material, design and fabrication knowledge, is it theoretically possible that, by incorporating sealed internal chambers into an object's design and printing the object in a vacuum, one could create a sort of "permanent vacuum balloon" that would achieve lift in Earth's atmosphere?
gpt
The problem is that it'll be only marginally better than hydrogen or helium. A cubic foot of helium provides about 31 grams of lift, while a cubic foot of vacuum will only provide 5 more- 36 grams. (Rough numbers, quickly googled). This is because relative to air, helium is already nearly "weightless"; the additional lift from removing the mass of the helium would be significantly less than the structure to withstand a vacuum.