Case in point, the residents of Iran, where a blue moon is now
almost a nightly occurrence Spaceweather.com says a severe dust
storm so large that it is visible from space is blowing across
Iran. Government officials have closed schools, cancelled
flights, and warned the elderly and children to stay indoors.
But on the other hand, it is turning the moon blue. (See image
here) The blue tinge is due to that dust storm scattering the
light particles to where just the blue survives. With the
lingering dust storm, blue moons could be quite regular there
for a while. That flies in the face of the term "once in a Blue
moon" which is supposed to be roughly every year or so. The
current mainstream definition is when you have two full moons in
a month. Since moon phases are about 29 days apart, it's rare to
squeeze two in a month. According to infloplease.com, which has
more blue moon stats than you can shake a stick at (really, I
tried!) there are 15 blue moons scheduled in the next 20 years,
with 2011, 2014, and 2017