Blood Moon 2023: Rare Lunar Eclipse Wows New Zealand Skies – Photos

The night sky put on a striking display recently, as a lunar eclipse – often called a “blood moon” due to the reddish hue it takes on – was visible across New Zealand. The event, captured in stunning images by photographers around the country, offered a rare opportunity for stargazers, as it may be the only lunar eclipse visible in New Zealand this year.

The eclipse occurred when the Earth passed between the Sun and the Moon, casting a shadow on the lunar surface. This alignment isn’t just a visual spectacle; it’s a demonstration of orbital mechanics and the interplay of light and atmosphere. As explained by Te Whatu Stardome astronomer Josh Aoraki, the reddish color isn’t due to the Moon itself changing, but rather the way sunlight is filtered through Earth’s atmosphere. During a sunrise or sunset, the atmosphere scatters away most of the blue light, leaving the red wavelengths to dominate – the same principle applies during a lunar eclipse, with Earth’s shadow acting as the extended “atmosphere.”

How the Earth’s Atmosphere Creates the “Blood Moon” Effect

The effect is a result of a phenomenon called Rayleigh scattering. This describes the scattering of electromagnetic radiation (of which light is a form) by particles of a much smaller wavelength. In Earth’s atmosphere, these particles are primarily nitrogen and oxygen molecules. Shorter wavelengths of light, like blue and violet, are scattered more strongly than longer wavelengths, like red and orange. That’s why the sky appears blue during the day. During an eclipse, the remaining red light is refracted, or bent, around the Earth and onto the Moon’s surface, giving it that characteristic copper-red glow. The intensity of the red color can vary depending on the amount of dust and clouds in Earth’s atmosphere.

New Zealand was uniquely positioned to view the entire duration of the eclipse, a fact that made the event particularly special for local astronomy enthusiasts. The eclipse began around 9:45 PM local time and reached its peak between midnight and 1:00 AM, with the most vivid coloration visible during that period. The moon’s height in the sky meant the eclipse was visible from almost anywhere in the country.

While this recent eclipse was a gorgeous sight, it’s significant to remember that lunar eclipses are relatively common astronomical events. However, the combination of a clear sky and full visibility made this particular eclipse stand out. The next total lunar eclipse visible from many parts of the world is slated for December 31, 2028.

The December 2028 Lunar Eclipse: A Rare Alignment

The upcoming December 31, 2028, lunar eclipse is already generating interest among astronomers. According to data from Wikipedia, this eclipse will have an umbral magnitude of 1.2479, indicating a significant portion of the Moon will pass through the Earth’s umbral shadow – the darkest part of the shadow. The totality phase, where the Moon is completely within the umbra, is expected to last 71 minutes and 20 seconds, with a partial phase lasting 208 minutes and 49 seconds. The eclipse will occur near perigee, the point in the Moon’s orbit when This proves closest to Earth, meaning the Moon will appear slightly larger in the sky. More details about the eclipse parameters are available on Wikipedia.

What makes the 2028 eclipse particularly noteworthy is that it will occur during a blue moon – the second full moon in a calendar month – and on New Year’s Eve/Day. This combination hasn’t happened since December 2009, and it will be the first total lunar eclipse to occur on New Year’s Day in recorded history. The next such event isn’t predicted until December 2047 (or January 2048 for many time zones).

Visibility and Regional Impact of the 2028 Eclipse

The 2028 eclipse will be fully visible over eastern Europe, Asia, and Australia. It will also be visible rising over Africa and Europe, and setting over the eastern Pacific Ocean and western North America. This broad visibility means a large portion of the world’s population will have the opportunity to witness the event.

Lunar eclipses, unlike solar eclipses, are safe to view with the naked eye. No special filters or protective eyewear are needed. This makes them accessible to anyone with a clear view of the night sky. The Courier-Journal notes that the “blood moon” effect is a result of the same atmospheric processes that create vibrant sunsets and sunrises. You can read more about the upcoming eclipse on the Courier-Journal website.

Future Research and Understanding Lunar Eclipses

While lunar eclipses are well-understood phenomena, ongoing research continues to refine our understanding of the complex interactions between sunlight, Earth’s atmosphere, and the lunar surface. Scientists use data from lunar eclipses to study the composition and dynamics of Earth’s upper atmosphere. By analyzing the wavelengths of light that are filtered through the atmosphere during an eclipse, they can gain insights into the presence of aerosols, dust, and other particles.

Further study of lunar eclipses can also aid improve models of light scattering and atmospheric transmission, which have applications in fields such as remote sensing and climate modeling. The continued observation and analysis of these events will undoubtedly lead to a more comprehensive understanding of our planet and its place in the solar system.

Looking ahead, astronomers will continue to monitor and predict future lunar eclipses, providing opportunities for both scientific research and public engagement. The December 2028 eclipse promises to be a particularly spectacular event, and it’s one that many skywatchers are already eagerly anticipating.