In the month of December last there was a natural phenomenon which has many allusions by the researchers thought this was seen clearly.

Blue Moon is usually considered as a metaphor because the moon actually does not look blue.
The term Blue Moon because the phenomenon is given twice a month full moon rare.
Total eclipse when the Moon enters totality at about 21:07 to 21:57 pm.
Blue moon could be seen clearly in the area of Central Java.
Blue moon is expected to be the result of bursts of existing ozone.

In addition, there is also a phenomenon called the Sun Lavender.
Where the sun when it's purple. The sun-colored lavender or purplish, and the first time, noctilucent clouds.
The composition of particles or substances in the atmosphere also affect the color of objects in the heavens from the earth's surface.
Volcanic ash or rather particles of volcanic ash which has a size of 1 micron can cause a blue light on the moon, and also scattering it resulted in lavender-colored sun. (from the eruption of Mount Krakatau and Mount St. Helen's, El Chicon, Pinatubo).
At least the phenomenon that is considered unreal this was proven true by the evidence that is in Central Java on December 10, 2011.