If you were able to travel at the speed of light for one year, you would cover a distance of approximately 5.88 trillion miles or about 9.46 trillion kilometers. This value is calculated by multiplying the speed of light, which is about 186,282 miles per second or 299,792 kilometers per second, by the number of seconds in a year (60 seconds/minute * 60 minutes/hour * 24 hours/day * 365 days/year).
However, according to the theory of relativity proposed by Albert Einstein, as an object with mass approaches the speed of light, its mass increases and time dilation occurs. Time dilation means that time appears to pass more slowly for the moving object relative to a stationary observer.
From the perspective of a stationary observer, if you were traveling at the speed of light, time would appear to stand still for you. Therefore, you would not age at all during your journey.
It's important to note that, according to our current understanding of physics, it is impossible for an object with mass to reach or exceed the speed of light. This example assumes a hypothetical scenario for the purpose of illustration.