1. The problem statement, all variables and given/known data Two cells that divide on earth each 10s start a travel to the Sun at v = 0.85c (Distance earth-sun: 1.5·10^11 m). How many cells should exist when the rocket they travel in carshes with the Sun? 2. Relevant equations Time dilation: t=t0/sqrt[1-v2] being t0 the time from a 'rest' sytem. 3. The attempt at a solution My results are: 10 seconds on earth mean 18.9 seconds on the rocket, due to time dilation, thus it will be less divisions by the time a person on earth watches the rocket crashes with the Sun. So: 259 cells (From system Earth) = 5,77·1017 cells 232 cells (From system Rocket) = 4 294 967 296 cells Is this correct? Thank you.