Total Lunar Eclipse to Cast Blood Moon Over UK on September 7

A total lunar eclipse, commonly referred to as a Blood Moon, is set to occur over the United Kingdom on September 7, 2025. During this celestial event, the Moon will take on a striking deep crimson hue as it passes through the Earth’s shadow. Astronomers at the Royal Observatory Greenwich have provided specific details on when observers should look to the sky for the best chance of witnessing this phenomenon.

A Blood Moon is a specific type of total lunar eclipse, where the Earth completely blocks direct sunlight from reaching the Moon. This alignment occurs when the Sun, Earth, and Moon are in a straight line. As a result, the only light illuminating the Moon comes from sunlight that has filtered through the Earth’s atmosphere, giving it that distinctive reddish color.

While lunar eclipses can vary in type, the most common include penumbral and partial eclipses. A penumbral eclipse occurs when the Moon passes through the Earth’s outer shadow, resulting in subtle shading. In contrast, a partial eclipse involves the Moon entering the Earth’s darker shadow, the umbra, partially darkening its surface. However, during a total lunar eclipse, the entire Moon is immersed in the umbra, leading to the captivating Blood Moon effect.

This upcoming event will be particularly challenging for UK residents to observe. The Moon will be relatively low on the horizon, making it essential for enthusiasts to find a high vantage point with a clear view to the East.

Timing is crucial for those wishing to catch a glimpse of the eclipse. According to the Royal Observatory, the best opportunity will occur at 19:33 BST, coinciding with the maximum phase of the eclipse. The peak moment, when the Moon is fully within the Earth’s umbra, will occur just before this at 19:11 BST, although the Moon will not yet be visible above the horizon at that time.

Following this total lunar eclipse, the UK will not experience another until December 21, 2028. A partial lunar eclipse will precede it on August 28, 2026. For those who missed the last total lunar eclipse on May 16, 2022, this forthcoming event presents an opportunity to witness this captivating astronomical occurrence.

Understanding the Moon’s characteristics enhances the excitement surrounding these celestial events. The Moon, Earth’s only natural satellite, is approximately 3,474 kilometers in diameter, making it the fifth largest in the Solar System. It is believed to have formed around 4.51 billion years ago. During lunar eclipses, the Moon appears dark red due to light refraction rather than direct sunlight, creating a haunting yet beautiful sight for observers.

This September, when the Blood Moon rises, enthusiasts should prepare for a unique spectacle that will be both a scientific marvel and a visual delight. Fingers crossed for clear skies, as any cloud cover could obscure this extraordinary view.