Humans will be gone long before the sun. Pessimistically, we'll extinct ourselves within the next few centuries. Optimistically, any remnant progeny of ours will be so distant from us today that they'll take the idea that they're descended from filthy animals (us) as as much of an affront as creationists re: our primate descent.
... And those smartasses who say we come descended from humans! Is that your culture and heritage? That's not my culture and heritage!
Even folks well versed in the English language have trouble defining the two words (ethics and morals) in relation to each other.