A galactic year is 250 million Earth-years. This is the time it takes for our solar system to make one revolution around the Milky Way Galaxy.

A jiffy is an actual unit of time for 1/100th of a second. Thus the saying, “I’ll be there in a jiffy”.

It takes eight and a half minutes for light to get from the sun to earth.

A Martian can sleep (or work) and extra half-hour every day compared to you. Mars days are 24 hours and 37 minutes long, compared to 23 hours, 56 minutes on Earth.

The age of the universe is 13.7 billion years.