The light-year, alternatively spelled lightyear, is a unit of length used to express astronomical distances and is equivalent to about 9.46 trillion kilometres (9.46×1012 km) or 5.88 trillion miles (5.88×1012 mi). As defined by the International Astronomical Union (IAU), a light-year is the distance that light travels in vacuum in one Julian year (365.25 days).^{[1]}https://www.iau.org/public/themes/measuring/ Because it includes the word “year”, the term light-year is sometimes misinterpreted as a unit of time.^{[2]}https://en.wikipedia.org/wiki/Light-year

So how long it would take us to travel a light-year? I*f we were a space shuttle that can travel five miles per second, given that the speed of light travels at 186,282 miles per second, ***it would take about 13,578,000 days, or 37,200 years to travel one light-year.**^{[3]}https://futurism.com/how-long-would-it-take-to-walk-a-light-year. *What about walking?* **That would take us some 225 million years **(that’s assuming that you managed a constant speed of 20 minutes for every mile and didn’t stop for any bathroom breaks…it would be a little trying, to say the least, especially when one considers that modern humans have only been around for about 200,000 years.