12.5 years 125 years 125,000 years 125,000,000 years
A light-year is the measure of how far light can travel in one year. How long has the light from a star 125,000 light-years away been traveling to reach Earth?

Options:
- 12.5 years
- 125 years
- 125,000 years
- 125,000,000 years

125,000 years