How does the timescale of universe failure due to instant hydrogen loss compare to the predicted Heat Death scenario?
Answer
It results in an instantaneous failure versus a gradual fading
The hypothetical scenario results in an instantaneous, universe-wide failure of stellar energy production, whereas the real prediction (Heat Death) involves a gradual fading over trillions of years as gas is used up or dispersed.
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Will the Universe Run Out of Hydrogen? - YouTube
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