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Galaxies Could Be Twice as Large as Previously Estimated - Universe Today
Galaxies are actually much larger than they appear in most telescopes. Astronomers working with the Gemini Observatory in Hawaii have found stars associated with galaxy NGC 300 at twice the previously estimated radius. These old, dim stars would have blazed brilliantly billions of years ago, but now it takes a powerful telescope to be able to see them. And if NGC 300 is probably twice as large as previously estimate, our own Milky Way galaxy could extend as much as 200,000 light-years across.