TECH

'Blue Moon' Phenomenon To Light Up Skies As July Comes To An End

31/07/2015 09:48 BST | Updated 31/07/2015 09:59 BST

Tonight, we will be treated to a very rare sight -- a blue moon.

Ok, so it's not actually going to be blue. It will look more like the normal, silver grey heavenly beauty that we are accustomed to seeing.

However, we should take time to stop and look up as this celestial occurrence is still a relatively rare phenomenon -- hence the nickname 'blue moon."

Normally, we usually see 12 full moons a year, but this year we have 13 -- a once in a "blue moon" kind of event.

The last time we had the pleasure of seeing a full moon light up our skies was on July 2.

That's not to say that we have never seen a literal blue moon.

A couple of centuries ago, in 1883, Indonesians witnessed a full blue (and sometimes green) moon for several years after the Krakatoa volcano erupted.

The resulting ash acted as a filter, allowing only the blue parts of the visible spectrum through.

Even if the moon looks rather boring tonight, it's worth a glance as researchers say the next time we will witness this phenomenon won't be till 2018 2018.

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