Correction: true identity of star given key to the abyss

Sermon on - primarily - discerning who the "star" (angel) coming down from heaven with the key to the Abyss was - Satan or a holy angel - and my error in following commentators who got it wrong. There are major ramifications if one thinks it is Satan, that will throw off a proper interpretation of what the 5th trumpet (also spoken of as the "first woe") is all about, which is crucial to understanding this key prophecy which bespeaks - in general, not precise - terms as regards where we are in the timeline of the end of the age.
So this is a brief examination of the Scriptures that address this point, and corrects a common error that plays havoc among Amillennial expositors.