Blue moon - level 2
There was a full moon on the 2nd of July and on the 31st of July. According to modern folklore, when there are two full moons in a month, the second one is blue.
However, this is not exactly true. Blue moons can happen, but there must be a volcanic eruption. Back in 1883, people saw blue moons almost every night after the Indonesian volcano Krakatoa exploded. Some of the volcanic ash worked as a blue filter.
On the other hand, the moon can also get red when it is low in the sky.
Difficult words: folklore (the traditional stories of an area or country), ash (very small dust), on the other hand (however).
You can read the original story and watch the video in the Level 3 section.
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