As an expert in astrophysics, I can tell you that determining the exact age of a star like Betelgeuse is a complex task that involves various astrophysical measurements and models. Betelgeuse, a red supergiant star, is located in the constellation of Orion. It's one of the largest and most luminous stars known, and it's also expected to go supernova at some point in the future.

The age of Betelgeuse is estimated based on its mass, size, and how it's burning through its nuclear fuel. Stars like Betelgeuse have relatively short lifespans compared to smaller stars because they burn through their fuel more quickly. Current estimates suggest that Betelgeuse is around 8 to 20 million years old, although these figures are not precise and are subject to revision as new data and models become available.

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Stars like that go through their nuclear fuel extremely rapidly; while the Sun is only approaching middle age at 4.5 billion years old, Betelgeuse is dying now at an age of less than 10 million years old.read more >>