Sky-watchers across much of the UK can look forward to a stunning spectacle this evening when a total lunar eclipse will turn the full Moon red.
As it passes through Earth’s shadow, it will take on a deep red hue, creating a striking “Blood Moon”.
While the full eclipse starts at 18:30 and lasts until 19:52, people in the UK will only be able to see it after the Moon rises, and that depends on where you are, with westernmost Cornwall only getting a minute or two.
What is a lunar eclipse and a blood moon?
A lunar eclipse takes place when the Earth is directly between the Sun and the Moon, blocking sunlight and casting a shadow across the Moon’s surface.
During total lunar eclipse, the Moon is completely engulfed by Earth’s shadow, often turning a striking red.
Before and after totality, the Moon passes through two other phases:
Penumbral lunar eclipse – A more subtle occurrence, where the Moon travels through the outer part of Earth’s shadow, resulting in a faint dimming.
Partial lunar eclipse – when only a portion of the Moon passes into Earth’s shadow, creating a visible dark segment.
The entire cycle on Sunday starts at 16:28 when the penumbral eclipse begins and ends at 21:55 when the post-totality penumbral eclipse ends. The eclipse is at its maximum at 19:11.
Lunar eclipses are sometimes referred to as “Blood Moons” due to the Moon’s reddish hue during the event.
“Throughout history, people thought of it as a bad omen. But really, it’s just the refraction of light through Earth’s atmosphere – the same effect that gives us red sunsets.
How to see it?
To best view the eclipse, get somewhere ahead of moonrise with as clear a view of the horizon as possible so that you can see the Moon as soon as it rises.
Binoculars or a telescope will help if you have them, and unlike with solar eclipses, which are dangerous to view directly, lunar eclipses won’t damage your eyes as the Moon’s reflected light isn’t bright enough.
The next lunar eclipse visible in the UK will be on 28 August 2026, so mark your calendars for another chance to witness this celestial event.