I find a related issue when astronomers talk about "other solar systems." There are many other star / planetary systems, but only one Sol. At best, they could s

I find a related issue when astronomers talk about "other solar systems." There are many other star / planetary systems, but only one Sol. At best, they could say "other Solar-like planetary systems" since that is usually the context this phrase gets used in. Having said that, this Wikipedia page lists the Electrical Motor as a type of engine. https://en.wikipedia.org/wiki/Engine https://en.wikipedia.org/wiki/Engine and nobody takes issue with the term "rocket engine." I can't find a Wikipedia page describing other stars as a type of Sol, though.