Piss on it. That will surely extinguish it

Earthlings must swallow the sun before it can swallow us

I've been broadcasting for help on frequency 1420.3556 MHz since the summer of 1977. No response yet, but fingers crossed.

I'll answer with another question.

War, what is it good for?

Destroy the earth before the sun can.

Coat the Earth in that bitter stuff they put on Nintendo Switch cartridges so the sun spits it out before it has a chance to swallow.

Let it swallow the earth then sue it for damages

Preemptive strike! Nuke the sun!

I’ll swallow it myself.

Vote against the ballot measure to stop an asteroid impacting Earth, but only in cases where the asteroid is going to adjust Earth's orbit to be farther away from the sun. As long as I didn't mess up becoming immortal 5 billion years should be enough time for these opportunities to come up, so I shouldn't have to bother with other sun-protection measures.

Pull out

Cry and masturbate. Oh wait, you said prevent?

Die so someone more useful in the fight to survive may have the resources I would have used up pointlessly.

SPF5000000000 sunscreen

I've been working on my leg strength so I can hold its jaws open with my feet.

Organize all firefighters, no, only the best firefighters in the world and lead them in a special mission to the Sun. We are gonna smother and extinguish that mf before it can hit us, and I'm gonna bang the hottest daughter of the firemen too, in case we fail!

i will put a mirror on my roof so that when the sun reaches earth it will be reflected back to where it came

I read A World Out Of Time. That's one way to solve that problem.

I've written a sternly worded letter to the editor of my local paper.

Put Jupiter in front of it, so that the Sun will choke to death before it can swallow us.

We're way ahead of you.

Seems too early to worry about it now. Ask me again in 4999999999 years.