When talking with a Christian, ask them if they believe their loved ones are in heaven. Tell them great. Have them go to the 143rd word (or so) and get the exact location for you. The raqiya (solid dome covering earth) is "heaven". Heaven is not above the raqiya, or below it. It is specifically the raqiya itself.
The raqiya was defined as a solid dome for 1000s of years. Only recently have people started to try to redefine the word instead of as "dome or firmament" to "expanse". So make a point that it is important that the we don't want any modern definitions that did not exist then messing with the bible.