On September 7, 2025, a total lunar eclipse, known as a blood supermoon, will transform the sky into a celestial stage for 82 minutes, the longest of the year. Though not directly visible in Brazil, where the Moon will be below the horizon, the event will be broadcast live on platforms like YouTube, NASA, and ESA, allowing Brazilians to follow along. The Moon, at its perigee, will appear up to 14% larger and brighter, taking on reddish hues due to the scattering of sunlight by Earth’s atmosphere. The spectacle, running from 12:28 to 17:55 Brasília time, will attract viewers in regions like Europe, Africa, and Australia, blending science and beauty in a rare astronomical event.
The phenomenon results from a perfect alignment of the Sun, Earth, and Moon, creating a striking visual effect. The supermoon, being closer to Earth, enhances its brightness and apparent size. For Brazilians, technology will bridge the gap, with live streams and virtual events hosted by institutions like the National Observatory.
- Eclipse phases: Penumbral, partial, and total, lasting about 5.5 hours.
- Streaming platforms: NASA, ESA, Time and Date, YouTube.
- Reason for red hue: Rayleigh scattering in Earth’s atmosphere.
Why the 2025 eclipse is unique
The blood supermoon of September 7, 2025, stands out for its exceptional 82-minute totality phase, when the Moon is fully immersed in the umbra, Earth’s darkest shadow. This extended duration is rare and occurs because the Moon is just 2.7 days from perigee, its closest point to Earth. This alignment makes the Moon appear larger and brighter, creating a stunning visual impact. The reddish hue, characteristic of a blood moon, may range from orange to deep red, depending on factors like dust or pollution in the atmosphere.
In cities like Lisbon, Nairobi, and Sydney, the eclipse will be visible to the naked eye, with adjusted local times. In Lisbon, totality will span from 18:30 to 19:52, while in Sydney, it will occur from 04:30 to 05:52 on September 8. Observers are advised to watch from the penumbral phase to catch all the event’s nuances.
- Totality duration: 82 minutes, the longest in 2025.
- Prime viewing regions: Europe, Africa, eastern Australia, New Zealand.
- Visual effect: Moon up to 14% larger and brighter.
- Atmospheric influence: Dust can enhance red or orange tones.
How to watch from Brazil
Though Brazil is outside the direct visibility zone, the 2025 blood supermoon can be enjoyed through live streams on reliable platforms. Institutions like NASA, ESA, and Time and Date will provide high-resolution images captured by professional telescopes. In Brazil, the National Observatory and astronomy clubs plan virtual events with experts explaining each phase, blending education and entertainment.
For an optimal experience, viewers should start watching around 13:15 Brasília time, about an hour before totality. A stable internet connection and headphones can make the experience more immersive, especially with scientific narrations detailing the event.
- Recommended platforms: NASA, ESA, Time and Date, YouTube.
- Ideal start time: From 13:15 Brasília time.
- Practical tip: Use a fast internet connection to avoid buffering.
- Virtual events: Live streams with commentary from Brazilian astronomers.
The science behind the red Moon
The blood supermoon’s reddish hue results from Rayleigh scattering, an optical phenomenon where Earth’s atmosphere filters sunlight, allowing red and orange tones to reach the Moon during a total eclipse. This effect creates a dramatic appearance that has captivated observers for centuries. The color’s intensity depends on atmospheric conditions like dust, pollution, or clouds.
In 2025, about 36% of the Moon’s diameter will be in the darkest part of the umbra, enhancing the visual impact. Astronomers predict vibrant hues, especially if atmospheric particles increase, such as after volcanic eruptions. This precise alignment of Sun, Earth, and Moon makes the event a milestone for astronomical studies and photography.
- Main process: Rayleigh scattering in the atmosphere.
- Color factors: Dust, pollution, or clouds in the atmosphere.
- Umbra depth: 36% of the Moon’s diameter covered.
- Visual impact: Red to orange tones, based on conditions.
Detailed phases of the lunar eclipse
The 2025 lunar eclipse will feature six distinct phases, each with unique traits. The penumbral phase begins with a subtle darkening as the Moon enters Earth’s lighter shadow. In the partial phase, the umbra starts covering the Moon, creating a striking contrast. Totality, the most anticipated moment, occurs when the Moon is fully immersed in the umbra, glowing red for 82 minutes.
After the peak, the Moon gradually exits the umbra, returns to the penumbra, and regains its natural brightness. Lasting about five and a half hours, the event will be captured by professional telescopes, allowing Brazilians to follow each phase via live streams.
- Penumbral phase: Initial subtle darkening of the Moon.
- Partial phase: Umbra covers part of the Moon, creating contrast.
- Totality: Moon fully red for 82 minutes.
- Total duration: Approximately five and a half hours.
Tips for an unforgettable experience
Even from afar, Brazilians can make the 2025 blood supermoon a memorable event. Choosing a comfortable setting with good lighting and internet is key to enjoying live streams. Scientific narrations offer a chance to learn about the cosmos, while screenshots of the images can be shared by astronomy enthusiasts on social media.
For some, the event carries cultural or spiritual significance, tied to renewal and cosmic connection. Jotting down thoughts or meditating during the stream can deepen the experience. The blood supermoon blends science and emotion, inviting all to marvel at the universe’s grandeur.
- Ideal setup: A spot with reliable internet.
- Complementary activity: Jot down reflections or meditate during the event.
- Learning opportunity: Follow streams with expert commentary.
- Photography: Save stream images to share.
What to expect from future events
For Brazilians eager to witness a lunar eclipse in person, another chance will come on March 3, 2026. This total lunar eclipse, with 65 minutes of totality, will be visible across Brazil without special equipment, making it accessible to all. Unlike the 2025 event, it can be seen with the naked eye.
Planning to observe in areas with low light pollution, like rural regions, will ensure a clearer view. The 2025 eclipse, even watched online, serves as a warm-up for this future event, connecting Brazilians to the wonder of celestial phenomena.
- Next eclipse: March 3, 2026, visible in Brazil.
- Totality duration: 65 minutes.
- Visibility regions: Americas, eastern Asia, Pacific.