1. A union between two famous people, which doesn't last long. The time it takes for light to travel the distance of the diameter of a subatomic particle is a quadrillion times longer than this union lasts.
2. When measuring the lifespan of something that fails, it's often measured in celebrity marriages.
1. Ben Afleck and J.Lo got into a celebrity marriage, but they were divorced before a camera's 1600 speed film could be exposed enough to take a picture of them in a married state.
2. Don't buy this preservative-free cow's milk, it lasts less than 10 to the hundredth power celebrity marriages.