Depends how you define "solar system". I was taxing a maximal definition of the outermost region where the sun's gravity has a meaningful effect; but also, it w

Depends how you define "solar system". I was taxing a maximal definition of the outermost region where the sun's gravity has a meaningful effect; but also, it wouldnt be 1000 light years, I agree. A more relevant number would just be distance to nearest system with planets of a relevant type. Or, likewise, the distance between this and the nearest galaxy (25k light years). Space is "big"; much much bigger than its maximal speed. Light is only fast "around here". Traversable space is tiny for everything; and minute for living things.