How long would it take to travel 40 light years
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- How long would it take humans to travel 40 light years
- How long would it take you to travel 40 light years
- How long would it take to travel 40 million light years
- How long would it take to travel 40 billion light years
- How long would it take a spacecraft to travel 40 light years
- How long would it take to travel to a planet 40 light years away
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- How many years would it take to travel 40 light years
- How long to travel 40 light years away