The last comment on the webpage seems to have the explanation of what it is.
FROM THE WEBPAGE - Not my own opinion:
"SC Wrote:
Hello, Roger.
I just came across your metal orb on the internet. I know what it is.
First, take note of the fact that a second interior sphere exists within, and that it is space roughly 1/2 inch from the outer walls. That is clue
#1.
Second, the welded metal cap on the outside is clue #2.
The circular structures between the inner and outer tanks is clue #3.
The inner sphere was spaced from the outer sphere for insulation. The welded cap is where a hard vacuum was pulled with a vacuum pump and the cap
welded on to prevent leakage. This forms a cryogenic storage device known as a Dewer flask. The sphere is a cryogenic storage tank that uses a vacuum
insulated jacket to prevent the warming of the material stored inside. The circular structures are spacers that keep the inner tank from hitting the
outer tank.
Now, the clamp with the Phillips screw is a grounding point where this crygenic tank would have been fastened to a larger assembly. If you examine the
underside of the clamp, you may be able to identify some small quantity of copper there, where the grounding cable would have been pulled free.
The handle is the mounting point for the tank, and is also referred to as a hard point.
The X-ray images show serpentine plumbing that winds about and comes back near the interior surface- this is a clue that the tank was meant to
function in microgravity. Gas bubbles would tend to cluster in the center and fluids would stick to the interior. The fittings with the wire or metal
rod sticking out are pretty typical air fittings meant to connect to pressure lines. One set would provide pressure into the core of the tank (see the
metal cylindrical structure in the X-rays) and the others would allow material to be drawn out of the tank. Usually, the lines themselves would be
stainless steel braid exterior lines; often they would also be vacuum insulated.
It is very likely that this is titanium. This is clearly the cryogenic storage tank for a spacecraft. It would have held either liquid helium for
cooling a sensor or it would have contained liquid nitrogen for the same purpose, as well as use as a pressurized gas propellant. Many satellites will
use LN2 as the material for small thrusters, as it boils into a vapor and provides reaction for movement or orientation control.
I seriously doubt if this was a fuel tank, bcause the amount of fuel or oxidizer is might have carried is small. However, it clearly has undergone
reentry. It might have done so inside the body of a larger craft, which would prevent a great deal of heat damage. Being buffeted by the outer shell
or debris, as well as the high pressure shock waves on reentry, is what collapsed the surface and dented it in.
So what you have is a cryogenic storage tank from a spacecraft that reentered the atmosphere- once again, most likely used for liquid nitrogen or
helium.
I am a fairly regular guest with Art Bell myself and recognized the structure of the tank immediately. I have worked for years in aerospace and debris
from space vehicles often contains odd or unusual shaped objects. This is due to the conditions under which they must function, and the limits on
space and mass that any spacecraft designer has to work with."