1. The problem statement, all variables and given/known data A star 10 light-years away explodes and produces gravitational waves. How long will it take these waves to reach the earth? 2. Relevant equations The problem is, I don't know what equations to use or if it's just a matter of simple math. 3. The attempt at a solution My answer is that it takes 10 years to reach the Earth, but something tells me that this is wrong. Can anyone help me solve this problem or tell me if my answer is correct?