How old is Jack and how young is Eve?

HI all!

The Cerra planet is 25 light years away from earth. Man has reached half the speed of light to travel. That means that it will take about 50 years for man to reach to Cerra.

When Jack entered Cerra, he was mourning for his wife's death. She must have died back on earth. So, when Jack reached Cerra, he was over 50 years of age. Also, since he was all ready a widower, he must be really old.

While on the other hand, Eve on Cerra has not yet married (according to the synopsis). So what is the age gap between the two? Also, Eve's hair in the pictures are white, which I suppose is simply white hair colour. considering the fact that many anime characters have colourful hair.

But the point is that Eve and Jack definitely have a great age difference unless if Eve has not married till late in her life and Jack was widowed much earlier.

That is one solution to the problem. ^_^