When that happens, some pretty drastic things will take place!Īccording to Nebular Theory, the Sun and all the planets of our Solar System began as a giant cloud of molecular gas and dust. This will stay the case for another four billion years, at which point, it will have exhausted its supply of hydrogen fuel. Over the course of the past four billion years, during which time planet Earth and the entire Solar System was born, it has remained relatively unchanged. To break it down, the Sun is about half way through the most stable part of its life. As always, God (or the Devil, depending on who you ask) is in the details! But this is just the abridged version of the Sun’s lifespan. This lifespan began roughly 4.6 billion years ago, and will continue for about another 4.5 – 5.5 billion years, when it will deplete its supply of hydrogen, helium, and collapse into a white dwarf. And like all stars, it has a lifespan, characterized by a formation, main sequence, and eventual death. In essence, it is a perfectly normal example of a G-type main-sequence star (G2V, aka. But with the advent of modern astronomy, humans have become aware of the fact that the Sun is merely one of countless stars in our Universe. The Sun has always been the center of our cosmological systems.
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