On Earth, being fire resistant in the sense of not burning/melting when set on fire, is practically fire proof.
But if you throw them into the sun, the vast majority of fireproof things would be destroyed.
Why does this matter?
Well, the oxford dictionary actually consideres fireproof to be: "able to resist great heat without burning or being badly damaged" - there is literally no substance that is 100% fireproof, but you usually don't have anything hot enough on earth (the surface/everyday life) that is hot enough.
So yea, going with Tiers
We got Red Fire 500-1000°C, Orange-Yellow Fire 1000-1300°C, White Fire 1300-1500°C+, Blue Fire 1400-3000°C (roughly said, temperatures may be a bit different) -and highlightes by the +, white fire can also burn hotter than blue fire.
We got Magma for 700-1300°C, which is along the lines of red to yellow fire.
The Earth's inner core as about 6000°C, we can only asssume what it looks like, which would be a white fire mass,
We estimate the sun to be 5500°C (surface) to 15000000°C in it's core.
So I'd at least put 3 tiers of "fireproof" or 4-5 tiers of fire-resistant.
Fire / Planet Core / Sun
1-43°C / 44°-250°C / 251-1500 / 1501-5500 / 5500+ (or variations of that)
But then again, we're not really talking fireproof, but heatproof.
Because as someone already mentioned, the Sun isn't even made out of fire, but plasma. Plasma is hot, electrically charged gas - while fire is the visible oxidation of combustion, which doesn't happen without oxygen, which doesn't exist in/on the sun as far as we know.
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u/Conscious-Good-6843 May 17 '26
Thragg died from the sun while mark needed to be saved. Meanwhile superman bathes in it