05-03-2014, 04:07 PM
(05-03-2014, 03:55 PM)Psychospacecow Wrote: 14. Light from a distant planet reaches Earth in 6.5 years. How far from Earth is this planet in meters?
Are we assuming that the planet and Earth don't move ? Because things are about to get mathematically insane if we factor in rotation around the planets' respective stars.
EDIT - If not, what Petie said.