The Russian orthodox is a largely a Moscow Patriarchate and ranks fourth in the order of the orthodox precedence. Roughly half of the eastern orthodox Christian live in Russia and have played a predominant role in the history of the culture of the eastern Europe.
Because Astronomers have well-tested theoretical models that explain how a star evolves over the course of its life as well as well-tested theoretical models that explain how a star evolves over the course of its life.