Idk any Mormon but I had to Google it:

“Kolob is described in the Book of Abraham as the celestial body nearest unto the throne of God in LDS theology. In contrast, K2-18b is an exoplanet located 124 light-years away, known for its potential to host water and possibly life.”

Honestly didn’t know that religious people actually believe that heaven is a physical planet, always thought that it’s something spiritual, but good to know thanks for the enlightenment ^-^