When tonight we look at the sky, the moon will sometimes turn red. And although the tone has earned it the nickname "blood", our satellite will turn that color only because of a total eclipse of the Moon . This Friday, July 27, as fixed by the astronomical calendar of 2018 will take place on the longest eclipse of the Moon of all the 21st century. The total phase will last 1 hour and 43 minutes while the total duration of the celestial phenomenon will be nearly four hours

A total eclipse of the Moon occurs when the satellite enters the Earth's cone of shadow. For this, the Sun, our planet and the own Moon – which will be in full phase – are aligned in the same plane. It will then be when the satellite will be dyed red, following the refraction of the solar rays because of the atmosphere of the Earth. Depending on the greater or lesser concentration of suspended dust particles of volcanic origin, it will become more or less reddish. Its transformation made that this event was historically baptized as Blood Moon .

The event will begin at 20:24 and will end nearly four hours later, at 00:19 (Peninsular Time). Spain). Moreover, the eclipse will occur in lunar apogee that is to say that our satellite will be at its furthest point from the elliptical trajectory that it makes around of the earth. Luna 's eclipse can be seen from Spain, although the best place to contemplate this event will be Islas Baleares . According to the National Astronomical Observatory it will be difficult at first to contemplate it since the satellite will always be under the horizon.