I, too, needed a way to try to picture a billion. I finally found it when I realized that my heart beats one billion times about every thirty years. Currently, I'm at about 2.2 billion.
Light travels at 186,300 miles per second, more or less. So a light-minute is 60 times 186,300, a light-hour x 3,600, a light-day x 86,400, and a light-year x 31,536,000. So, a light-year is about 5.9 trillion miles, and 10 billion light-years is 5.9 sextillion miles. I'm just going to pace that off--I'll be right back.
“I’m just going to pace that off”
Are you back yet?