[Red Badger]

In 4 billion years, give or take a half billion, the Sun will transition to its Red Giant stage, expanding in size all the way out to the orbit of Mars, incinerating everything inside that limit; Mercury, Venus, Earth and Mars will all be vaporized to become stardust once again.....................

[Reeses]

In 4 billion years, give or take a half billion, the Sun will transition to its Red Giant stage

If we stay on autopilot, yes, but we'll be passing a few hydrogen gas stations along the way.