Explaining The Universe on Instagram: "On the scale of the galaxy, time spans are almost beyond human imagination. Our Milky Way galaxy is about 13.6 billion years old, nearly as old as the universe itself, and it takes the Sun about 230 million years to make a single orbit around the galactic center — one “galactic year.” This means that since the Sun formed around 4.6 billion years ago, it has only completed about 20 galactic orbits. Events in the galaxy unfold on immense timescales: stars liv

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