Unusual atmospheric conditions. However, the timing of the question is a little suspicious, so I'm going to answer a question you didn't ask also.
There are about 29.5 days from one full moon to the next. This means that there are a little over 12 full moons in a year, and once in a while there are two full moons in the same month. For some reason I don't fully understand, people call the second full moon in a month a "blue moon". It has nothing to do with the color of the moon, and the moon is no more likely to lookblue on the second full moon in a month than it is at any other full moon.
The sun.
The term "blue moon" refers to the second full moon in a calendar month, which happens roughly every 2.7 years. The moon does not actually appear blue in color. The phrase "once in a blue moon" has led to the misconception that the moon can appear blue at times.
The term "blue moon" refers to the occurrence of two full moons in a single calendar month. The moon itself does not physically turn blue during a blue moon phase; it will look the same as any other full moon. The term "blue moon" is simply a naming convention based on this calendar occurrence.
The moon sometimes appears red because of smoke or dust in the air. It's really the air that is 'red', but it makes the moon look that way, too.
Because its setting. (maybe)
A blue moon can refer to the second full moon in a month or the moon actually being blue. We sometimes see a full moon twice in one month due to the moon's cycle of slightly less than one month. A moon which is actually blue may result from pollutants or dust in the atmosphere, making the moon look blue.
On the moon the sky will look blue.
The sun.
Its fairly rare, but sometimes a second new moon may appear in a month, called a 'blue moon'.
The term "blue moon" refers to the second full moon in a calendar month, which happens roughly every 2.7 years. The moon does not actually appear blue in color. The phrase "once in a blue moon" has led to the misconception that the moon can appear blue at times.
the moon Type your answer here...
no but sometimes it's a mysterious gold and greenish orange
The term "blue moon" refers to the occurrence of two full moons in a single calendar month. The moon itself does not physically turn blue during a blue moon phase; it will look the same as any other full moon. The term "blue moon" is simply a naming convention based on this calendar occurrence.
It sometimes has a blue glassy look to it!
The common name for the second full moon in a calendar month is a "blue moon". Pop quiz; what month can NEVER have a blue moon? Answer: February.
The moon.
The moon.