Ilu is everything including God (Eru), spirits, Ea and the Void.
Ea is the Universe, natural creation; it does not include God (Eru), spirits or the Void (Timeless Halls).
Arda is properly the Solar System (Kingdom of Manwe) though it is sometimes used to refer to the Earth.
Ambar/Imbar (The Habitation) is the Earth.
[ February 03, 2003: Message edited by: Tar Elenion ]
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Tar-Elenion
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