Assume I travel near c from a planet 5 light years away

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SUMMARY

The discussion centers on the effects of relativistic travel near the speed of light (c) on aging, specifically when traveling from a planet 5 light years away to Earth. It is established that while an observer on Earth perceives the journey as taking a little over 5 years, the traveler aboard the spaceship experiences significantly less time due to time dilation. At speeds of 99.9% of the speed of light, the traveler would age approximately 3 months during the journey, illustrating the profound implications of Einstein's theory of relativity and the Lorentz factor.

PREREQUISITES
  • Understanding of Einstein's theory of relativity
  • Familiarity with the Lorentz factor
  • Basic knowledge of time dilation concepts
  • Awareness of relativistic speeds (e.g., 99.9% of the speed of light)
NEXT STEPS
  • Research the Lorentz factor and its mathematical implications
  • Explore time dilation effects in practical scenarios
  • Study the implications of traveling at relativistic speeds on human physiology
  • Investigate theoretical spacecraft designs capable of near-light-speed travel
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Physicists, aerospace engineers, science fiction writers, and anyone interested in the implications of relativistic travel and time perception.

Altair
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to the earth. I will arrive at Earth a little over 5 years from the time I depart, correct? How many years will I have aged as a passenger on the spaceship and how long will someone on Earth have aged during my journey?
 
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According to an observer on the Earth, your journey took a little more than five years.

According to you, aboard the spaceship, your journey was nearly instantaneous, and you would have scarcely aged at all.

- Warren
 

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