Method of large sphere production at zero gravity

A method to create hollow spheres 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 structure having inner cell walls by action of the blowing agent with the molten material;
• expanding the volume of said molten material by said foaming;
• forming a sphere of said foamed molten material;
• cooling the outside surface of said sphere leaving remaining molten material;
• solidifying said outside surface by said cooling;
• breaking the foam's inner cell walls;
• forming a hollow interior in said sphere by said breaking of said foam's inner cell walls;
• cooling said remaining molten material;
• and
• forming an inner sphere wall having a solid surface within said solid outside surface by cooling said remaining molten material.