Which one of the following is a reason why astronomical distances are measured in light-years?

Question

Accepted Answer

The only thing absolute in this universe according to Einstein is the speed of light, rest everything is relative. Light travels at the speed of about 300,000 km per second and it is always the same throughout the universe. A light-year is the distance light travels in one Earth year.On the scale of the universe, measuring distances in miles or kilometers doesn't cut it; therefore, astronomers measure the distances of stars and other astronomical distances in the time it takes for light to travel to us. Hence, option (d) is the correct option.Source: Class 11th NCERT