The Sun will exhaust its nuclear fuel in about .

Question

Quizplus · Accepted Answer

The Sun is currently estimated to have about 5 billion years of fuel left before it exhausts its hydrogen and enters the Red Giant phase. This is based on current models of stellar evolution and the observed rate of nuclear fusion in the Sun's core. Option B (5 million years) is too short of a timeline for the Sun to exhaust its fuel, while option C (50 billion years) is too long as the most accepted estimate for the Sun's lifespan is around 10 billion years. Option D (5000 AD) is a specific year and not a valid choice for this question.

The Sun Will Exhaust Its Nuclear Fuel in About