How does Light travel for thousands of light years?

About 5.86 trillion miles.

distance light travels in one year about 891132810293471327048723.31834827841872381483 miles per hour. To put it in more simple terms light travels 5.8 trillion miles in a year.

Correct. Light travels at 299,792,458 metres per second (299,792.458 km/s). This equates to about 9454254955488 km per year. Therefore, one light year is about equal to 9,454,254,955,488 km.

a light-year is the distance that light travels in a vacuum in one year..

Yes it is about 9,5 * 1012 kilometers