But it is significant that these speculations lead so often to words like "darkness" and "blackness." These are Biblical terms too.
Speaking of those teachers and leaders who would promote anti-Biblical doctrines of God and His great salvation through the Lord Jesus Christ, the Apostle Peter warned that "these . . . speak evil of the things that they understand not; . . . to whom the mist of darkness is reserved for ever" (II Peter 2:12,17).
Similarly Jude compares them to "wandering stars, to whom is reserved the blackness of darkness for ever" (Jude 13).
The Lord Jesus Himself referred to "outer darkness" as the ultimate home of the lost. In His familiar parable of the talents, the judgment on the servant whose unfruitfulness had proved he was not a true servant was to "cast ye the unprofitable servant into outer darkness: there shall be weeping and gnashing of teeth" (Matthew 25:30; see also Matthew 8:12; 22:13).
This ultimate home of the lost is also called "hell," of course, and the Lord called it "the lake which burneth with fire and brimstone" (Revelation 21:8), the sea of "everlasting fire, prepared for the devil and his angels" (Matthew 25:41).
As to the location of this fiery lake, we know only that it is not on the earth. The "beast" and the "false prophet" will be dispatched to the lake of fire before the disintegration of the present earth (Revelation 19:20; 20:11), and all the unsaved not until after that event (Revelation 20:15). The new earth will be one "wherein dwelleth righteousness" (II Peter 3:13). The obvious inference of all this is that hell will be a vast lake of fire somewhere far out in the "outer darkness" of the created universe, possibly in a dark nebula, or even a black hole.
The fire will be real and easily able to destroy bodies, but it cannot annihilate spirits. All men and women have been created in the image of God and God is eternal. He is the Creator, not the de-Creator, and "whatsoever God doeth, it shall be for ever" (Ecclesiastes 3:14). The outer darkness will be "a world of iniquity . . . set on fire of hell" (James 3:6), where all vestiges of goodness and love and light are gone forever. No wonder Jesus urged men to "Fear Him, which . . . hath power to cast into hell" (Luke 12:5).
God's created universe is also eternal with all its multitude of stars, and the lake of fire will occupy only a small, probably remote, region in comparison.
Praise ye Him, sun and moon: praise Him, all ye stars of light. . . . He hath also stablished them for ever and ever: He hath made a decree which shall not pass (Psalm 148:3,6).
And all who are saved—those who believe His word and have received His great salvation through faith in Christ—shall live and praise Him for ever.
And they that be wise shall shine as the brightness of the firmament; and they that turn many to righteousness as the stars for ever and ever (Daniel 12:3).
Although many have chosen the way that leads to outer darkness, there will also be many living forever in the Holy City on the new earth. "And there shall be no night there; . . . for the Lord God giveth them light" (Revelation 22:5).
Brunson20.com a site by an RM who writes articles, organizing & explaining doctrines. He quotes lots of early brethren & goes along with Kolob Theorem & expands on it.