Just Who is the Woman of Revelation 12? (English Edition)

What is this "great wonder" of Revelation 12 that the apostle John saw in heaven in his vision? Of WHAT is the sign? What do the sun, moon and 12 stars associated with this woman represent? Who was the CHILD born to this mysterious woman? Catholic tradition assigns the identity of the woman to the Virgin Mary after her assumption into heaven, where she is revealed in all her glory as the "Queen of Heaven." Some people identify the woman as the Church, and the man-child she gives birth to are the saints. The woman is also identified as Eve because she supposedly mirrors the conflict in Genesis 3:15 between Eve, the serpent, and her unborn seed! So what is the TRUTH -- just WHO is this woman of Revelation 12?