Nothing. It’s [b][i]light[/i][/b]

Paracausality You can do anything without side effects

12

Hey, have a little propriety! The Traveler is really sensitive about its weight. It shed a lot of pounds during the Collapse, but it’s still pretty self-consciousness about its round figure. [spoiler]There are several estimates of the Traveler’s size. It would be possible to figure out the volume. Then you would use the volume to figure out the weight, but we don’t know what the Traveler is made of (we could pick a generic metal as a reference weight). The Traveler is also apparently at least partially hollow and we can see some interior parts from the Tower. The partial hollowness makes it much harder to discover the weight, because we don’t know how hollow it is. But if we figured out the thickness of the shell then we would maybe be able to get a close-ish estimate of the weight by finding the weight with the full sphere volume then subtracting the volume of the hollow space. Keep in mind that the Traveler doesn’t even obey the laws of physics, so trying to calculate its weight might be completely pointless.[/spoiler]

<It's only 14 kilometers in diameter. It'd have to be made out of some hefty -blam!-ing material to actually do something that grand. Which is funny because at least part of that shell is made of neutronium... which is exactly the kind of hefty -blam!-ing material to do something that grand. In that case, I'll chalk it up to space magic or limited quantities.>