1.) What does the heaven represents if woman did not float in outer space?
The place where the sun, moon, and stars are located in the visual metaphor - and backdrop of the vision. Go outside, look up into the sky in the day and night. Where the sun, moon, and stars are - that is heaven.
In verses 1 and 2 and 3, heaven meant the third heaven, where John was, when he was presented Revelation.
2.) What does the sun, moon, and stars reprsent, if woman did not literally wore them?
Individually,
in Joseph's original dream - the moon and sun, Joseph's father and mother, and the eleven stars - his eleven brothers.
Genesis 37:10 And he told
it to his father, and to his brethren: and his father rebuked him, and said unto him, What
is this dream that thou hast dreamed? Shall I and thy mother and thy brethren indeed come to bow down ourselves to thee to the earth?
In Revelation 12, the woman is Israel; the sun, imo, the word of God ; the twelve stars - the twelve tribes making up Israel . The moon under her feet - time.
3.) Why was the red dragon appears in heaven?
To keep the messiah from growing up and taking away his (Satan's) dominion over the earth. And replacing it with the Kingdom of God.
4.) What does seven heads, ten horns, and seven crowns upon his heads represents?
The ten horns - ten end times concurrently reigning kings of the Roman Empire.
In actual terms - the final form of the EU.
The seven heads - seven sequential kings of one family of rulers of the Roman Empire.
The sevens crowns on the heads of the seven heads (in Revelation 12) - indicates that with the seven years in Revelation 12, 12:6 plus 12:14, king seven has come to power. The little horn ruler of the EU in its final form.
The ten horns do not have their crowns (in Revelation 12) because the person is not yet the beast. That does not happen until Revelation 13, with 42 months left in the 7 years. The ten horns have their crowns in that chapter.
5.) Why did Satan drw third part of stars of heaven? And cast them to earth?
Satan convinced a third of the angels to rebel, and to join his side. And marshaled his resources to have dominion over the earth. Prince of persia, prince of greece in Daniel 10, for example.
6.) How will dragon devour woman's child? Born in heaven?
In the context of Revelation 12, convinced herod to kill all of the first born under the age of 2. Then later, tried to convince Jesus to kill himself, in the temptation in the wilderness. Then convinced the religious leaders to plot to have Jesus put to death.