system
Given the following post, respond as if you're commenting on Reddit:
human
Eli5 Why does Jupiter not explode when meteors hit it considering it’s 90% hydrogen?
gpt
Combustion needs oxygen.  
Even on earth it is possible to have too much fuel to oxygen to burn. Engines can “flood” with too much gasoline in the cylinder to burn, or there can be too much fuel to oxygen in the ratio to combust.   

Jupiter is like 90% hydrogen and 9% helium with the rest in small percentages. Nowhere near enough to oxygen to combust. Even more so with helium being an inert gas that does not react to most things.       


An example is gasoline. After 7%-ish at atmospheric pressure there is too much vapor to support an explosion.