The Hebrew word Sheol is equivalent to the Greek word Hades, and they refer to a temporary "prison" where the spirits of all of the unrighteous people throughout history will remain until Judgment Day. The Greek word Tartarus refers to a "dungeon" (possibly within Hades) in which certain fallen angels are being held until Judgment Day. Hades is described as being under (or inside) the earth. The Greek word Gehenna is equivalent to the Lake of Fire, and this is the place where all of the unrighteous people throughout history will be tormented day and night (along with the devil and his demons). This is probably the place that most people would associate with the English word "Hell." In that case, Jesus did not go to Hell after He died. "Paradise" was a compartment within Hades in which the spirits of all of the righteous people were held until after Jesus' death and resurrection and ascension into Heaven. Jesus went down to Hades after He died, and then He took the Paradise compartment of Hades up into Heaven. So Paradise and all of the Old Testament saints are now in Heaven, and Christians go straight to Heaven when we die (rather than going down to Hades first). I do not see in scriptures where we go into "soul sleep" after we die. (Could be wrong?? But I do not see it!) This is kinda the conclusion...but will be glad to discuss this subject!