Skywatchers across North America, South America, Europe, Africa, and parts of Asia are in for a rare celestial treat today. A total lunar eclipse, often called a “Blood Moon,” will paint the night sky in deep red hues as Earth passes directly between the Sun and the Moon. Unlike solar eclipses, lunar eclipses are completely safe to view with the naked eye, making this event accessible to millions of people without special equipment.
The eclipse begins at 9:31 p.m. EST (6:31 p.m. PST) when the Moon first enters Earth’s outer shadow, known as the penumbra. This subtle shading is difficult to notice at first, but over the next hour, the Moon will gradually darken. The real drama unfolds at 10:27 p.m. EST (7:27 p.m. PST), when the Moon starts moving into Earth’s darker central shadow, the umbra. This marks the beginning of the partial eclipse, where the Moon appears to have a dark bite taken out of it.
The Stages of the Total Lunar Eclipse
The total eclipse phase begins at 11:29 p.m. EST (8:29 p.m. PST), when the Moon is fully immersed in Earth’s umbra. This is when the “Blood Moon” effect becomes most dramatic. Instead of disappearing, the Moon takes on a coppery-red or rusty-orange color. The exact hue depends on atmospheric conditions, particularly how much dust and clouds are present in Earth’s atmosphere. Volcanic eruptions or widespread wildfire smoke can deepen the red tones, while clear skies may produce a brighter, more golden shade.
Totality lasts for 85 minutes, ending at 12:53 a.m. EST (9:53 p.m. PST) on November 9. After that, the Moon will gradually emerge from Earth’s shadow, transitioning back through partial eclipse until 2:00 a.m. EST (11:00 p.m. PST), when the event concludes. For observers in the Eastern Time Zone, the eclipse will reach its peak just after midnight, making it a late-night spectacle. West Coast viewers, however, will see the total phase begin earlier in the evening, around 8:30 p.m., making this a more family-friendly event.
The timing of lunar eclipses is predictable because the Moon’s orbit is well understood. This particular eclipse is the second total lunar eclipse of 2023, following one that occurred on May 15. The next total lunar eclipse won’t happen until March 13-14, 2025, so today’s event is a must-see for astronomy enthusiasts.
Why Does the Moon Turn Red?
The red color of a Blood Moon is a result of Rayleigh scattering, the same phenomenon that gives sunsets their warm hues. During a total lunar eclipse, sunlight passing through Earth’s atmosphere is filtered and refracted, bending around the planet and illuminating the Moon. Shorter blue wavelengths are scattered away, while longer red and orange wavelengths are focused onto the Moon’s surface. The effect is similar to what happens during a sunset, where the sky turns red as the Sun dips below the horizon.
This year’s Blood Moon is particularly noteworthy because it coincides with the Beaver Moon, the traditional name for the November full Moon. Native American tribes gave this name because it marked the time when beavers finished building their dams before winter. Other names for the November full Moon include the Frost Moon and the Mourning Moon in various cultural traditions.
The intensity of the red color can vary significantly from one eclipse to the next. During the 2019 total lunar eclipse, for example, the Moon appeared exceptionally dark and deep red due to volcanic ash in the atmosphere from the Raikoke eruption earlier that year. In contrast, the 2022 total lunar eclipse was brighter and more orange because Earth’s atmosphere was relatively clear. Today’s eclipse could fall anywhere on the spectrum, depending on current global conditions.
How to Watch the Eclipse Safely and Best Viewing Locations
Unlike solar eclipses, which require protective eyewear, lunar eclipses are completely safe to observe without any special equipment. You can watch the entire event with just your eyes, or enhance the experience with binoculars or a telescope to see more detail on the Moon’s surface. For the best view, find a location with a clear, unobstructed horizon, especially if you’re watching from a city where buildings or trees might block your view.
The eclipse will be visible from start to finish across most of the United States, Canada, Mexico, and Central America. In South America, the entire event will be visible, while observers in Europe and Africa will see it during the early morning hours of November 9. Parts of Asia, including eastern Russia and Japan, will witness the eclipse at moonrise, meaning the Moon will appear low on the horizon as it enters Earth’s shadow.
If you’re planning to photograph the eclipse, you’ll need a camera with manual settings and a tripod to avoid blurry images. Start with a wide-angle shot to capture the Moon’s position in the sky, then switch to a telephoto lens to zoom in on the details. Use a low ISO setting (100-400) to reduce noise, and experiment with exposure times between 1/60th and several seconds, depending on the phase of the eclipse. For a full guide on photographing lunar eclipses, check out our Photography category.
Cloud cover could be a concern for some viewers. Check local weather forecasts and consider traveling to a location with clearer skies if necessary. National parks and remote areas often offer the best viewing conditions, away from light pollution. If you’re unable to watch the eclipse in person, several observatories and astronomy websites, such as NASA and the Virtual Telescope Project, will be streaming the event live online.
Cultural and Historical Significance of Blood Moons
Throughout history, lunar eclipses have been viewed with a mix of awe and fear. Ancient civilizations often interpreted them as omens or messages from the gods. The ancient Mesopotamians believed that a lunar eclipse signaled an attack on the king, while the Chinese thought a dragon was devouring the Moon. These myths reflect the profound impact celestial events had on early societies, which relied on the predictable cycles of the Moon for calendars and agriculture.
In medieval Europe, lunar eclipses were sometimes associated with the biblical apocalypse or the end of the world. The Book of Joel in the Old Testament describes the Sun turning to darkness and the Moon to blood as a sign of the “great and terrible day of the Lord.” These interpretations persisted for centuries, reinforcing the idea that eclipses were supernatural events rather than natural phenomena.
Today, we understand the science behind lunar eclipses, but they continue to captivate people around the world. For many, watching a Blood Moon is a humbling reminder of our place in the universe. It’s a chance to connect with the rhythms of the cosmos and appreciate the beauty of celestial mechanics. Whether you’re an amateur astronomer, a casual skywatcher, or simply someone who enjoys a rare natural spectacle, today’s eclipse offers a moment of wonder.
As the Moon rises in the east tonight, take a moment to look up. The Blood Moon won’t last forever, but its memory might just inspire a lifelong interest in astronomy. For more on space and astronomy, explore our Science category, where we dive into the latest discoveries and celestial events.
