A day on Mars

NASA’s Curiosity Rover has landed on Mars.  A lot of time an effort has gone in to scheduling what will be done there, when it will be done, how much time it will take, etc.  The work there is done using specific local (Mars) solar time, and the Martian day is 24 hours and 39… Read More.

Time and medical care…

I was visiting a friend in the hospital a few months ago.  She had a medicated IV drip line (an infusion pump) that allowed precise tuning of how much “stuff” was administered.  If it knew that it was dosing at, say, 50ml/hour and it had a 500ml bag then it would need to be changed… Read More.

New atomic clock is 100x better…

A new clock is coming to town, an atomic clock, and it’s 100 times more stable than the best atomic clocks we have right now. It should keep time to within 1/20th of a second for 14 billion years, the age of the Universe.

How long is a day?

I suspect very few people think about how long a day is, and of that number, fewer still wonder if the length of a day changes much, or what sort of things affect the length of the day.