I thought I'd make this little topic to allow any members to not only discuss any of the Sciences, but post questions they may like to ask and share around any interesting bits of information they come across in their travels.
Sadly you're right - the moon doesn't have gravity so the lead weights wouldn't weigh a thing. A ton of feathers on the sun would actually weigh 10,000,000 x million tons if they survived the temperatures that approach 10,000 Fahrenheit. That's because the sun is very big so it attracts a lot of gravity. The more you know. Here's a puzzler: if you weighed the universe, what single category item would be the heaviest? Water? Iron? Or something else?
Moon's gravity compared to earth: 1/6 Sun's gravity compared to earth: 28x 1000 tons of iron on the moon = 166 tons 1 ton of feathers on sun (assuming they don't burn up) = 28 tons But the problem was meant to be a mockery of these kinds of silly bullshit problems so whatever. Galactic superclusters.
I think he was making a mockery of the topic. Your average dudebro thinks there's no gravity on the moon. Also, wall structures such as the Sloan Great Wall are more massive than galactic superclusters, but there seem to be fewer of them. So by category I would go with superclusters as the heaviest thing in the universe.
If were talking about a single "object" then my answer would be a neutron star, the densest known matter in the universe. Of course, science is yet to tackle the challenge of analyzing the density of Armadeadn Haarrrr