So my friend and I had a debate. He stated that we don't have to worry about the sun consuming the Earth ─ we'll already be broken apart by then. He states that as the sun expands, its Roche limit will also expand. The Earth will have been broken apart long before the sun touches its orbit.
I'm arguing that the sun isn't changing mass (ignoring Mercury, Venus, and solar winds) and its gravitational force won't change, ergo eventually the boundary of the sun will be further than the Roche limit. The Earth will stay intact as it gets cooked.
Which, if either, of us is correct?