Volume vs Circumference of a massive body. In the spacetime diagrams it is often shown that the space around massive bodies is warped in a way that seems to indicate the actual volume of a massive body is larger than 4/3 pi r^3. If you measure the radius from the circumference by traversing it, and then measured the diameter by traversing it, and then calculated the respective radius’s, then it appears that the radius as measured from traversing the diameter would be larger than the radius as derived from traversing the circumference. It’s kinda as if the massive body is like the Tardis from Doctor Who, more space on the inside. Is this indeed correct?