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How fast would a man-made craft have to go in miles per hour to reach 4.3 light years away within a human lifetime?

Answer :

Final answer:

To make it to a star 4.3 light years away in our lifetime, a man-made craft would have to travel at a speed of approximately 315 billion miles per year or about 864 million miles per day.

Explanation:

In order to determine how fast a man-made craft would have to travel to reach a star 4.3 light years away in our lifetime, we need to consider the speed of light and how long a human lifetime typically is.

The speed of light is about 186,000 miles per second, and there are about 31.5 million seconds in a year. Therefore, in one year, light travels about 5.87 trillion miles.

To determine how fast the craft would have to go, we can multiply the distance of 4.3 light years by 5.87 trillion miles per year. The result is approximately 25.2 trillion miles.

If we assume that a human lifetime is 80 years, we can divide the distance by 80 to find the required speed.

25.2 trillion /80 = 315 billion miles per year.

The craft would need to travel at a speed required for Interstellar travel is approximately 315 billion miles per year or about 864 million miles per day.

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