On the night of September 7 to 8, 2025, the sky will host one of the year’s most anticipated astronomical events: a total lunar eclipse, dubbed a blood supermoon, lasting 82 minutes. This phenomenon, where the Moon takes on a striking reddish hue, will be the longest total lunar eclipse of 2025 and the second lunar eclipse of the year. Visible in regions like Europe, Africa, eastern Australia, and New Zealand, it won’t be directly observable in the Americas, including the United States. However, live streams on platforms like YouTube will allow global audiences, including Americans, to witness the event. The blood supermoon occurs when a full Moon, near its perigee, appears larger and brighter, and Earth’s shadow tints it red. This celestial display captivates astronomers and skywatchers alike with its visual splendor and cultural significance.
The eclipse will begin at 11:28 AM and end at 4:55 PM EDT, with totality occurring from 1:30 PM to 2:52 PM. The reddish hue results from sunlight filtering through Earth’s atmosphere, scattering blue light and letting red tones reach the Moon. For those outside the visibility zones, online streams provide an accessible way to enjoy the event in real time.
- What is a blood supermoon?: A full Moon at perigee during a total lunar eclipse.
- Why isn’t it visible in the U.S.?: The Moon will be below the horizon during the event.
- How to watch?: Live streams on astronomy channels and platforms like YouTube.
Why this eclipse stands out
The total lunar eclipse of September 2025 is remarkable for its 82-minute duration, the longest of the year, according to Space.com. The Moon will be just 2.7 days past perigee, making it appear up to 14% larger and brighter, qualifying it as a supermoon. The blood-red color, caused by the scattering of sunlight through Earth’s atmosphere, creates a dramatic visual effect. This phenomenon, known as Rayleigh scattering, filters out shorter wavelengths like blue, allowing red and orange hues to dominate.
The extended totality offers a rare opportunity for observers in optimal regions. Cities like Perth, Mumbai, Cairo, and Cape Town will have prime views. In Perth, totality will be visible from 1:30 AM to 2:52 AM local time, while in Mumbai, it will occur from 11:00 PM to 12:22 AM the next day. Experts recommend starting observations 75 minutes before totality to catch all phases, from the penumbral stage to the Moon’s full return to brightness.
- Totality duration: 82 minutes, the longest in 2025.
- Prime visibility regions: Europe, Africa, eastern Australia, New Zealand.
- Peak timing: 1:30 PM to 2:52 PM EDT.
How to watch from the United States
Although the United States won’t have direct visibility, Americans can still experience the eclipse through live streams. Astronomy channels like NASA, ESA, and Time and Date will broadcast high-quality footage from professional telescopes. Platforms such as YouTube and social media will also offer free streams, making the event accessible to all. To fully enjoy the experience, start watching about an hour before totality to see the eclipse’s progression.
Some U.S.-based observatories, like the Griffith Observatory, may host virtual events with expert commentary. These streams are perfect for those eager to learn about the science behind the eclipse. Ensure a stable internet connection and a quiet setting for the best viewing experience.
- Recommended platforms: YouTube, NASA, ESA, Time and Date.
- Suggested viewing time: From 12:15 PM EDT.
- Pro tip: Use headphones for expert narration during streams.
Why the Moon turns red
The Moon’s reddish hue during a total lunar eclipse is a scientific marvel. As Earth aligns between the Sun and Moon, sunlight passes through the atmosphere, where Rayleigh scattering disperses blue and violet light, allowing red and orange tones to reach the Moon. This creates the iconic blood-red appearance that has fascinated humanity for centuries.
The intensity of the red color depends on atmospheric conditions, such as dust or cloud cover. In 2025, the eclipse is expected to display a vivid red, as 36% of the Moon’s diameter will be immersed in the darkest part of Earth’s shadow, the umbra. This precise alignment enhances the visual impact, blending science with awe-inspiring beauty.
- Cause of the color: Rayleigh scattering in Earth’s atmosphere.
- Influencing factors: Dust, clouds, and atmospheric pollution.
- Visual effect: Deep red to orange hues, varying by conditions.
Stages of the lunar eclipse
A total lunar eclipse unfolds in six distinct stages, each with unique features. It begins with the penumbral phase, where the Moon enters Earth’s lighter shadow, appearing slightly dimmed. The partial phase follows, with part of the Moon covered by the umbra, the darkest shadow. Totality occurs when the Moon is fully within the umbra, glowing red. The process then reverses, with the Moon exiting the umbra and penumbra.
For those in visible regions, observing all stages offers a complete experience. In the U.S., live streams will capture every phase, allowing viewers to follow the event from start to finish. The entire eclipse, including all stages, lasts about five and a half hours, with totality being the highlight.
- Penumbral phase: Moon dims slightly in the outer shadow.
- Partial phase: Part of the Moon darkens in the umbra.
- Totality: Moon glows red for 82 minutes.
Tips for enjoying the event
Even without direct visibility in the U.S., viewers can make the eclipse a memorable experience. Choose a quiet space with good lighting for watching streams. Astronomy enthusiasts can screenshot high-quality images from broadcasts for personal collections. Many streams include expert insights, offering a chance to deepen your understanding of the event.
For those interested in the cultural or spiritual significance, the blood supermoon is often seen as a time for reflection or renewal. Journaling or meditating during the event can enhance the experience. Regardless of how you engage, the eclipse is a moment to connect with the wonders of the universe.
- Ideal setup: Quiet space with reliable internet.
- Complementary activity: Journaling or meditation during the stream.
- Learning opportunity: Follow expert commentary for scientific insights.
Future eclipse opportunities in the U.S.
Those who miss the September 2025 eclipse will have another chance soon. According to NASA, the next total lunar eclipse visible in the United States is set for March 3, 2026, covering the Americas, eastern Asia, Australia, and the Pacific. This event will feature about 65 minutes of totality and be visible to the naked eye across the U.S. Marking your calendar now ensures you won’t miss it.
The 2025 eclipse, even if viewed online, reminds us of the universe’s grandeur. It unites people worldwide through a shared appreciation of the cosmos. Prepare to watch the blood supermoon and immerse yourself in this celestial spectacle.
- Next eclipse date: March 3, 2026.
- Visibility regions: Americas, eastern Asia, Australia, Pacific.
- Totality duration: Approximately 65 minutes.