You can't put out the sun. It's not firey like as in fire, it's nuclear reactions, and it wouldn't just make a bunch of vapour. It's too hot for steam to even exist, it becomes "supercritical" I think is the physics term, it's too hot to even be a gas above 700 degrees or so (the surface of the sun is between 9000 and 10000 degrees Fahrenheit, and even the colder, redder stars you find in the universe are still between 4000-5000 degrees, so way over 700) :
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It'd just keep splitting the water into hydrogen and oxygen and fuel helium fusion reactions with the hydrogen it already has meeting all the new hydrogen; the sun would keep getting bigger and more violent and more hot until there was so much weight it all crunched down into a black hole that started sucking up all the water that passed the event horizon
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Actually long before the planet was in danger of touching it's star, it would become a star itself. Consider the diamater of the Sun: 864,000 miles, vs. Earth's distance from the Sun: 92,960,000 miles. So as you can see before the planet got even 1/92nd of the distance from the star it was orbiting around it would go critical.
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I'm questioning whether the mass increase of the planet might actually send it out of orbit, or into the star before it reached critical mass so drowning the star may have actually been a relevant question.
Episode 18 — Finish The Fight!
in Nerd Poker
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Actually long before the planet was in danger of touching it's star, it would become a star itself. Consider the diamater of the Sun: 864,000 miles, vs. Earth's distance from the Sun: 92,960,000 miles. So as you can see before the planet got even 1/92nd of the distance from the star it was orbiting around it would go critical.
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I'm questioning whether the mass increase of the planet might actually send it out of orbit, or into the star before it reached critical mass so drowning the star may have actually been a relevant question.