TONIGHT a lunar phenomenon will grace the skies as the moon turns red during a total eclipse.
A rare lunar event is taking place tonight, as the Moon undergoes a total eclipse, turning red in the process.
This will be the longest eclipse of the century and a real treat for stargazers and novices alike.
Why is the Moon turning red?
Tonight’s lunar eclipse will see the Moon turn eerily red/orange as it passes through the Earth’s shadow.
Known as a Blood Moon, this is a result of light refraction during the eclipse.
A lunar eclipse occurs when the Earth, Sun and Moon perfectly align creating a shadow.
Sunlight is refracted through the Earth’s atmosphere, removing all colours except those in the red colour spectrum.
These then bounce out of the Earth’s atmosphere and onto the Moon, causing the eerie red glow that we will see tonight.

Why is it the longest eclipse of the century?
The Earth is currently the furthest away possible on its rotation from the Sun, meaning the distance and angle of the shadow cast will take a long time to pass through.
The eclipse will last for one hour, 43 minutes and 35 seconds, and will be the 17th total lunar eclipse of the century.
The next will take place on January 21 2019.
How to watch the Blood Moon
Unlike a solar eclipse, a lunar eclipse is perfectly safe to look up at without eye protection.
To get the best view, being in a place with no light pollution such as the countryside or green open spaces will give an uninterrupted view.
Those unable to witness the eclipse firsthand can visit Slooh or Greenwich Observatory websites to see a live stream of the event.






