The moon travels to a similar position every month, but the tilt of its orbit means it normally passes above or below the Earth's shadow - so most months we have a full moon without an eclipse.
Because blue and violet wavelengths are scattered more than red and orange ones, more of the red wavelengths reach the moon, making the moon appear red. Still, he said the upcoming blood moon could be a sign that "these are the last days".
The last lunar eclipse occurred on January 31, 2018.
Mars already appears brighter and it will shine even more vividly as the big day approaches.
Craig Keener, a New Testament professor at Asbury Theological Seminary, told HuffPost he believes most biblical scholars would be uncomfortable with ascribing theological significance to blood moons.
For those lucky enough to have clear skies, moonrise will be at 8.49pm in London, 9.46pm in Glasgow, 9.02pm in Cardiff and 9.27pm in Belfast, with mid-eclipse occurring at 9.21pm and the "total" phase ending at around 10.13pm.
For those looking to capture the astronomical event, preparation is key.
At the same time, Mars hovered near the moon in the night sky, easily visible to the naked eye.
Taking steps such as using a tripod to minimise vibrations and integrating the moon with the surroundings to give a sense of scale and place can lead to great photos. "But Christians should nurture that expectation without needing to look to blood moons and the like".
The total lunar eclipse, which turns the moon blood-red, has particularly been a source of dread and panic for people who did not comprehend the circumstances that led to this "strange" phenomenon.
If you are a lover of sky-gazing lover, do not miss the opportunity to enjoy tonight's spectacular red moon. The sky show will not be visible from North America, but there's still a way to catch all the action surrounding the "blood moon" online. The partial eclipse of the moon will begin at 11.54 pm on July 27 and the total eclipse will begin at 1 am on July 28.
Dr Emily Brunsden, director of the University of York's Astrocampus, added that this eclipse was a "micro blood moon". According to NASA, the best places to witness the celestial event from start to finish are eastern Africa, the Middle East, India and central Asia.
Prof O'Brien explained that people in the United Kingdom would "need to have a clear south-eastern horizon as the Moon comes up" in order to see it.More news: 'I-Been-Watching-You' Cold Case Girl Killer Caught by DNA