What does the Marathon symbol represent?

J. Reginald Dujour, Marathon artist and person responsible for creating the Marathon symbol, had this to say on what the symbol represents: I designed the icon to represent a world within a world… Marathon the spaceship being build inside a hollowed asteroid. Thanks to Kyjel Shaytolmae who tracked down Reg back in Apr 20, 1998 and asked him about the Marathon symbol.