They'd left him in that tank for more than half an Earth year!
She would be about four and a half Earth years old now.
Several committee members are more than a hundred thousand Earth years old.
He'll live for more than a hundred thousand Earth years.
There hadn't been an interstellar war for more than a million Earth years.
"My normal life span would be perhaps one hundred Earth years, certainly not much longer."
I expect to be away for many thousands of Earth years.
A young girl, certainly no more than ten or so Earth years old.
He was quite young, not yet twenty Earth years by the look of him.
It would be impossible to do during a winter that is longer than an Earth year.
