Why are the phases of the moon so predictable that they can be published on calendars that are printed at least a year ahead of time?

   With my best educated guess it's just like knowing when the triangle in a shape pattern comes up again.
   They know what the moon looks like if it was night time and so they say "Hey, since we got this moon phase right now then this other moon phase is going to be tomorrow!" and so they keep going.
   With the knowing when the next blue moon or blood moon will come they look at other times it has happened and connect the dots telling them "Every this amount of days the blue moon will come." Again this is just my educated guess so I could be a correct but it be more science to it.
Hope at least I gave you a good idea.

Wavelength = pie*69+69 with ur mom

Stars are born within the clouds of dust and scattered throughout most galaxies. a familiar example of such as a dust cloud is the orion nebula. turbulence deep within these clouds gives rise to knots with sufficient mass that the gas and dust can begin to collapse under its own gravitational attraction. as the cloud collapses, the material at the center begins to heat up. known as a protostar, it is this hot core at the heart of the collapsing cloud that will one day become a star. three-dimensional computer models of star formation predict that the spinning clouds of collapsing gas and dust may break up into two or three blobs; this would explain why the majority the stars in the milky way are paired or in groups of multiple stars.therefor, i would say the answer is: dust and gases contract.i hope this ! < 3