How long does it take to travel a light year? Complete and specific information for you
The popular science fiction novel Dune famously posited that light can travel at the speed of thought. In this case, the speed of light would be considered very fast, or c=3×108m/s. However, when scientists concur on a fact, their definition of ‘fast’ is usually different from ours. To them, c is slow compared to what they’ve seen. The space exploration term ‘light year’ refers to the length a light wave travels in one full year. That is, 1 light year equals 1 billion meters per second. When considering the vastness of space, it’s easy to see that light has a very long way to go before it reaches its source.
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The light from a distant galaxy takes about 4 years to reach earth. That’s because the light travels at c for about 4 years before reaching us. It then takes about 4 months for our eyes to see it and for our brains to process it. After that, our bodies create new skin layers and hair cells to filter out the incoming electromagnetic waves. Furthermore, we create new blood cells so our eyes can see in greater detail as our vision matures. Essentially, every part of our biological processes represent an obstacle that slows down the arrival of external information.
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It takes about 365 days for the human body to create a patch of skin. That’s because each epidermal layer needs time to grow and die so new layers can form. The time it takes to form new skin also includes time spent eating food and inhaling air. These processes create new carbon atoms that are incorporated into the newly forming outer layer of skin cells. After that new layer forms, living cells within your body move in and take up residence within it. These living cells produce dermal proteins and other substances necessary for your epidermal layer to function properly. After 365 days pass, your skin now acts as a filter for external stimuli that can then enter your body and contribute to your mental health and survival capabilities.
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We can travel about 9 light years before finding a new galaxy. That’s because current human technology limits how far we can go with our biological processes slowing us down further still. Our biological processes allow us to only travel 9/365ths of the way through our galaxy before they stop us from seeing stars- which are galaxies themselves- further away. Further still, Einstein’s theory of relativity limits how fast we can move through space- which is where we’re traveling right now via light waves. Even then, we have a natural limit on how fast we can travel via rocket engines or human power- both of which consume fuel and limit their speed by natural law as well: /
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As far-reaching as space exploration may be, it’s still hardwired into nature’s rules for biogenesis and physical limitations imposed by our own bodies. For now, these physical boundaries help us understand and interpret the vastness of outer space through innovative scientific minds such as their own. Only time will tell if humanity will ever reach these far-flung corners of space or if we’re content with what we’ve found here on earth so far!
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