I typed a space after the *, but the spacing became really wide and hard to control. The space also disappeared. I copied a half-width space and pasted it after the *, and now it looks normal.
I have never heard of a half space character on a keyboard, but I do know that keyboards vary according to the language.
Illustrator has five types of spaces in addition to the spacebar. You might try an Em or En space. Both are fixed width, if you need to line up other items. Spaces have a variable width and may not line up.