Jerald R. Johansen discusses Kolob in his POGP commentary; calls it a "great star".
Jerald R. Johansen, A Commentary on the Pearl of Great Price: A Jewel Among the Scriptures (Bountiful, UT: Horizon Publishers, 1985), 35, 123
God lives on another planet, ". . . on a globe like a sea of glass and fire" (D&C 130:7). He lives on a celestialized world near the great star called, in Egyptian, "Kolob" (see Abraham 3:3). It is a great Urim and Thummim where all things are manifest; past, present, and future, and are continually before the Lord (D&C 130:6–8). It is like the sun in its brilliance and glory (see 1 Corinthians 15:40–41). No spaceship could land on Kolob's surface any more than a spaceship could land on the surface of the sun.
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Not only did Abraham see the stars and suns, planets of the universe, but he was told the times and seasons of this earth in relation to the times and seasons of God's world (see Abraham 3:4, 5). These were the things that those in the civilization of Egpyt were already interested in knowing. Abraham's revelations on these facts were used as an approach to interest Egyptian leaders in other concepts of the gospel. Abraham needed to know the Egyptian terminology of the planets, suns, and stars. Words like "Shinehah," which is sun, "Kokob," which is star, "Olea," which is moon, "Kolob," meaning governing one, etc. "And the Lord said unto me: Abraham, I show these things unto thee before ye go down into Egypt, that ye may declare all these words" (Abraham 3:15).