How far can light travel in four years? The answer could be represented as a very long number. Simplified, the answer is four light-years. Most simply, I like to think of the answer as “Penny.”
Today Miss Penny Mayhem turns four (Earth) years old. The tendency with birthdays is to remark how fast time flies, but it seems Penny flies at relativistic speeds because no one in my family believes she’s only been with us for four trips around the sun.
Emily thought Penny must be six. My brother was certain the little wild thing (Penny, not Emily) was even older. I started to question my own sanity so we had to go back and double check the math. Despite the evidence I’m still not sure my brother is convinced. I’m only marginally more confident.