# Water molecules on the Sun? How does that work?

I've been reading about water on the Sun. The water they talk about is supposedly in a gaseous state because the Sun is so hot. But I'm wondering how even that could exist. Wouldn't the extreme temperature of the Sun ($> 5000^\circ{\rm C}$ on the surface) split it into hydrogen and oxygen through thermolysis, which can occur at just $2000^\circ{\rm C}$?

• Sunspots are cooler than the rest of the sun, about 3800K. If there is oxygen in the sun, there is plenty of hydrogen around for it to combine with. Some fraction may be water molecules even if they don't last long. Commented Dec 3, 2017 at 1:07
• @mmesser314 So I guess the question that remains is weather or not their is oxygen on the sun. But even if their is, to me Oxygen + Hydrogen + 3800K spells out hydrogen explosion, not rain clouds;) thanks anyways :) Commented Dec 4, 2017 at 23:00

The rate constant of the reaction is $k=Ae^\frac{-Ea}{RT}$, where Ea is activation energy and T is Temperature. A is a constant based on the reaction and R is ideal gas constant. You can see the correlation between temperature and rate here, k will never reach infinity as long as the temperature is finite.