You are making a few assumptions 1. that there are planets, especially when there is no mention (in the Bible anywhere) of God creating planets.
LOL!! God did not mention He created the moon nor the sun either!! Seriously?
Explain a bottomless pit on a globe earth.
The word is abyss. From
άβυσσος
ávyssos
gorge chasm
crevasse cavity
fissure ravine
canyon pit
hollow pass
Rev is a symbolic book mostly.
It is the condition of the earth after the return of Jesus when He takes His saved back with Him to heaven for the 1000 years.
Rev_20:3 And cast him into the bottomless pit, and shut him up, and set a seal upon him, that he should deceive the nations no more, till the thousand years should be fulfilled: and after that he must be loosed a little season.
Jer 4:23 I beheld the earth, and, lo, it was without form, and void; and the heavens, and they had no light.
Jer 4:24 I beheld the mountains, and, lo, they trembled, and all the hills moved lightly.
Jer 4:25 I beheld, and, lo, there was no man, and all the birds of the heavens were fled.
Jer 4:26 I beheld, and, lo, the fruitful place was a wilderness, and all the cities thereof were broken down at the presence of the LORD, and by his fierce anger.
Jer 4:27 For thus hath the LORD said, The whole land shall be desolate; yet will I not make a full end.
Jesus comes back for the saved only---the living wicked are destroyed with the brightness of His coming. The saved are with Him---there is no one for Satan and His angels to deceive for a 1000 years. This broken down, desolate, empty earth is Satan's jail for those 1000 years. He can see what his rule has done. Not that is will change him. For after the 1000 years God will resurrect the all the wicked. And Satan gathers them together to go against the New Jerusalem---fire comes down from God and destroys Satan and all his followers---nothing but ashes left of them all. Sin is finally destroyed.
Rev 20:7 And when the thousand years are expired, Satan shall be loosed out of his prison,
Rev 20:8 And shall go out to deceive the nations which are in the four quarters of the earth, Gog and Magog, to gather them together to battle: the number of whom is as the sand of the sea.
Rev 20:9 And they went up on the breadth of the earth, and compassed the camp of the saints about, and the beloved city: and fire came down from God out of heaven, and devoured them.
Rev 20:10 And the devil that deceived them was cast into the lake of fire and brimstone, where the beast and the false prophet are, and shall be tormented day and night for ever and ever.
Eze 28:15 Thou wast perfect in thy ways from the day that thou wast created, till iniquity was found in thee.
Eze 28:16 By the multitude of thy merchandise they have filled the midst of thee with violence, and thou hast sinned: therefore I will cast thee as profane out of the mountain of God: and I will destroy thee, O covering cherub, from the midst of the stones of fire.
Eze 28:17 Thine heart was lifted up because of thy beauty, thou hast corrupted thy wisdom by reason of thy brightness: I will cast thee to the ground, I will lay thee before kings, that they may behold thee.
Eze 28:18 Thou hast defiled thy sanctuaries by the multitude of thine iniquities, by the iniquity of thy traffick; therefore will I bring forth a fire from the midst of thee, it shall devour thee, and I will bring thee to ashes upon the earth in the sight of all them that behold thee.
Eze 28:19 All they that know thee among the people shall be astonished at thee: thou shalt be a terror,
and never shalt thou be any more.
When Jesus comes for the saved and we all go to heaven for those 1000 years----we will get to turn around when we are way out there and look back at the earth----then you will have your answer once and for all---flat or round?