Our galaxy is called the Milky way galaxy because it looks like a splash of milk in the sky .In the night,a faint band of light is visible in the northern sky .This dim light comes from nebulae and stars,The galaxy is vast measuring about about 100,000 light years across (1 light year is approximately 9,460 billion km) .Our galaxy is a spiral-shaped disc with a bulge at the center sending four arms spiralling outwards .
But if we compare the Milky way galaxy with the whole Universe it would be as we comparing our Earth to the Milky way galaxy .
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