Method of large sphere production at zero gravity

A method to create a hollow structure comprising the steps of:

• mixing a blowing agent with molten material;
• suspending said mixture in a zero gravity environment;
• foaming said material to form a cellular mass having cell walls by action of the blowing agent with said molten material, said cellular mass having an exterior outside surface and an interior of inner cells;
• expanding the volume of said molten material by said foaming;
• forming a shape of said molten foamed material cellular mass;
• cooling the outside surface of said structure, said interior inner cells remaining molten;
• solidifying said outside surface by said cooling;
• accessing said interior inner cells;
• breaking the interior inner cell walls of said foamed material structure;
• forming a hollow interior in said structure by said breaking of said inner cell walls, allowing the broken cell wall material to coalesce on the inside of the solidified outer surface of said structure;
• cooling said coalesced cell wall material;
• and
• forming a structure wall having a solid inside surface within said solid outside surface by said cooling of said remaining molten material.