What is a light year?
a) A measure of time in space
b) The distance light travels in a year
c) The distance to Alpha Centauri
d) A term used only in science fiction
1 answer
b) The distance light travels in a year
a) A measure of time in space
b) The distance light travels in a year
c) The distance to Alpha Centauri
d) A term used only in science fiction
1 answer