Not only do stars evolve, but galaxies do as well.
Pop-science books are terrible for using colloquial definitions of words and scientific definitions willy-nilly. But "evolve" is one they should know to avoid.
Also, my iPad's autocorrect thought that "willy-nilly" was best represented as "silly-hilly". I eagerly await the autocorrect errors that will enter our language -- "silly-hilly" is pretty good.
Imagine a future where the etymology of a phrase is "iOS autocorrect of traditional phrase", and there are distinctions made between iOS autocorrect and Android autocorrect, and the various versions. Phrases get bastardized all the time by people until they form new entries into the lexicon. Why not have them mechanically bastardized with the determining human component being whether they bother to fix it?
