Question
On March 15, 2015 we observed the explosion of a star in our galaxy that is
250ly away. On what date did this explosion actually happen?
250ly away. On what date did this explosion actually happen?
Answers
Steve
well, what was the date 250 years ago?
A light-year is the distance light travels in a year. So, it took the light 250 years to get to earth.
A light-year is the distance light travels in a year. So, it took the light 250 years to get to earth.