"The moon usually turns a deep, dark red because it is illuminated by light that has passed through the Earth's atmosphere and has been bent back towards the moon by refraction", the British Royal Observatory explained.
I'll tell people to look at the moon on any random night, but tonight, Friday July 27, is when you should really be turning your head toward the sky.
What is a blood moon? The moon gives off no light and is only visible because it reflects the light of the sun.
Stargazers in Northern Ireland could miss out on a rare opportunity to catch a glimpse of the lunar eclipse when it appears on Friday.
Though there is much we understand about lunar eclipses, some mysteries still remain.
When the full moon moves into Earth's shadow, it will darken, but it won't disappear.
There are several apps and pieces of equipment to help amateurs and professionals snap the best image.
How often does a blood moon occur?
Whether a full moon turns coppery red depends entirely on the atmospheric conditions and how much dust is in the air to bounce off the light from the sun.
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If you want to watch online the lunar eclipse live stream, just read on for the stream and everything you need to know about the phenomenon.
What is the blood moon prophecy?
If you're in North America and want to watch the lunar eclipse, you still can. Less direct sunlight will reach the eastern (lower) side of the moon, and you may notice the moon dimming slightly from that side. You can tune it at the eclipse timings and watch the entire event without any interruptions.
As we get ready to witness a total lunar eclipse today (July 27), here's a photo throwback to the rare supermoon total lunar eclipse of September 28, 2015. Those who live in Asia and Australia will be able to see the eclipse between midnight and sunrise on July 28.
Unfortunately, the eclipse will only be considered partial in New Zealand.
The Met Office has warned there is a potential for showers to develop across the eastern half of the United Kingdom so the best places to observe the celestial event will be towards the western parts of the country.
Otago and Southland were some of the best places to see the event as it lasted longer.