I don't think you are impolite to me. It is you who think I was impolite by writing your name wrong. Anyway, the least I can do is to welcome you to the forum.
其實我這類網民, 習慣了回應不寫對方名字, 根本唔會介意這算是尊重不尊重, 只不過一時班門弄斧, 隨手找個例子講吓智慧, 將他人的主觀認定套在你的身上, 正是有口話人無口話自己, It's my fault, my apology!
A white dwarf is stable once formed and will continue to cool almost indefinitely; eventually, it will become a black white dwarf, also called a black dwarf.