I see Steve Allen has already supplied a thorough answer. Interested
individuals might also scrounge through the list archives (http://
rom.usno.navy.mil/archives/leapsecs.html) since the topic has come up
before. In fact, Demetrios Matsakis speculated on solar system wide
timescales even

Rob Seaman scripsit:
I don't have an envelope large enough, but there are various issues
to consider. The Hurtling Moons of Barsoom are much smaller than our
own and should have a negligible tidal breaking effect. (See http://
www.freemars.org/mars/marssys.html, for instance, for their

I referenced this page, but missed the most interesting part of it:
http://www.exo.net/~pauld/physics/tides/tidalevolution.htm
The height of a tidal bulge on a planet is proportional to the
inverse cube of the distance between the planet and the object
causing the tidal bulge. The torque

Neal McBurnett scripsit:
I wouldn't be too quick to dismiss tidal braking from Phobos. It's
awfully close to Mars, and tidal braking is as you say an inverse-cube
effect. The formula (kai Wikipedia) is (2GMmr)/R^3, where M and m are
the masses, r is the radius of the primary, and R is