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Are their any chances of the astronaut to visit the near by galaxies ?

If yes,How will it be possible?

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Proxima Centauri is 4.3 light years away so it would take that amount of time to get there at the speed of light. Our galaxy alone is over 70k light years across. According to theory nothing can go past light speed. But no technology we have today can let us test that theory. A very long time I'm afraid. Also the nearest external galaxy to our own, M31 or the Andromeda galaxy is about 2 million light years from us. Intergalactic travel? Not likely...

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Thanks for the more accurate answer. I was too lazy to look up the actual distances.
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No problem. We actually have 2 satellite galaxies that are bound gravitationally to the Milky Way that are much closer. The Large Magellanic Cloud and the Small Magellanic Cloud but full blown galaxies, M31 is the closest. Sometimes I hate living in the Northern Hemisphere because so much more is visible below the southern horizon.<g>
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Maybe in a couple trillion years

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I don't think you appreciate the scale of the universe. "Nearby" galaxies are thousands of light years away. The nearest star in our own galaxy is a couple of light years away! Unless hyper-light travel is invented, we won't ever see much of our own galaxy, since it will take hundreds of years to reach even nearby stars. Other galaxies are out of the question.

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