Revelation 12:4

  ⁴ His tail swept down a third of the stars of heaven and threw them to the earth. Then the dragon stood before the woman who was about to bear a child, so that he might devour her child as soon as it was born.

 We pick up the story in verse four, where we get more information about the motive of the dragon that appeared in verse three, which was red in color and described as having, "seven heads and ten horns, and seven diadems on his heads."

Revelation 12:7-8

 ⁷ And war broke out in heaven; Michael and his angels fought against the dragon. The dragon and his angels fought back, ⁸ but they were defeated, and there was no longer any place for them in heaven.

I found the timeline of this a bit confusing; it does appear that at the beginning the woman exists in some kind of astronomic frame with the symbols of the sun, moon and stars in the imagery, denoting outer space. The dragon's tail sweeps a third of the stars out of the sky; if this signifies all the angels that fought against God when Lucifer rebelled against Him this would suggest a tremendous amount of beings were banished to Hell by God for their rebellion.

Revelation 12:13-14

 ¹³ So when the dragon saw that he had been thrown down to the earth, he pursued the woman who had given birth to the male child. ¹⁴ But the woman was given the two wings of the great eagle, so that she could fly from the serpent into the wilderness, to her place where she is nourished for a time, and times, and half a time.

 

Verse 13 seems to be telling us that since Lucifer has been cut off or separated from God and thrown out of heaven he now makes it his focus to pursue the church, which is what the woman in the text is said to symbolize, whether this be a reference to Jews or Christians or both.