Photo de stock - This giant spiral disk of stars, dust and gas is 170,000 light-years across, or nearly twice the diameter of our Milky Way galaxy M101 is estimated to contain at least one trillion stars About 100 billion of them could be similar to our Sun

Photo de stock: This giant spiral disk of stars, dust and gas is 170, 000 light-years across, or nearly twice the diameter of our Milky Way galaxy  M101 is estimated to contain.

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