By the time the blood moon is rising on Friday evening in the United Kingdom, it will have begun to pass out of Earth's shadow - although it will still remain quite red. Seen from the naked eye across the country, the eclipse will last over 100 minutes making it the longest of the century. From 1:15am to 2:43am, the moon will be in the middle of the Earth's shadow and will appear reddish in colour. But fret not, as in this technology-driven world, watching the night skies is no problem even if your view of the eclipse is not as clear as you would want it to be.
While other colours in the spectrum are blocked and scattered by the Earth's atmosphere, red light tends to make it through easier.
"In the middle of a lunar eclipse it can look as if a red planet has taken up residence near the Earth - they are both eerie and attractive and I'll certainly be looking out for it!"
In addition, during Friday's eclipse, the Moon will be at its "apogee" - the point farthest from the Earth.
"The total stage of the eclipse will end at 22.13 BST, and by then the Moon will have risen to an altitude of only four degrees, or just about eight times its own diameter, above the south-east horizon", he added.
A few places in Northern Ireland may be lucky enough to see a so-called blood moon on Friday night. And that is why it's also known as the blood moon.
Don't miss tomorrow's Blood Moon — the longest lunar eclipse of the 21st century
Chandra Grahan or Lunar Eclipse 2018 dates and time in India: The longest lunar eclipse of the 21st century will be seen over the July 27 night and the early hours of July 28.
Unlike solar eclipse, you do not need any special filter to watch a lunar eclipse.
"Sometimes, the moon passes through the lighter part of Earth's shadow, causing a penumbral eclipse and total eclipse occur when the Earth completely block Sun rays from reaching the moon", he said.
This happens because blue light undergoes stronger atmospheric scattering, so red light will be the most dominant color highlighted as sunlight passes through our atmosphere and casts it on the moon.
It coincides not only with Mars's close approach, but with what he described as a "procession of planets" - a line-up of our celestial neighbours that will give skywatchers a particularly good view of Venus, Jupiter, Saturn and Mars. In Invercargill there is five minutes between sunrise at 8:12 and moonset shortly thereafter, with the Moon entirely within Earth's shadow. North America and Greenland will miss out entirely. It will be 15 times brighter than the next brightest star in the sky. It is called a lunar eclipse, according to NASA website.
"Less dark eclipses may show the moon as dark grey or brown.as rust-coloured, brick-red, or, if very bright, copper-red or orange".