Its lifetime as calculated from this assumption using the virial theorem, around 19 million years, was found inconsistent with the interpretation of geological records and the (then new) theory of biological evolution. Alternatively, if the Sun consisted entirely of a fossil fuel like coal, considering the rate of its thermal energy emission, its lifetime would be merely four or five thousand years, clearly inconsistent with records of human civilization.
The calculated duration of this celestial entity, based on a particular assumption using the virial theorem, was found to be around 19 million years, but this conflicted with the geological data and the newly accepted theory of biological evolution. Alternatively, if the Sun were entirely made up of coal-like fossil fuel, taking into account its thermal energy emission rate, its lifespan would be estimated at only four or five thousand years, which is inconsistent with human civilization's recorded history.