Blood moon in 2025: witness the longest total lunar eclipse of the year

On the night of September 7 to 8, 2025, the sky will host one of the most anticipated astronomical events of the year: a total lunar eclipse lasting 82 minutes, the longest of 2025. Known as a “Blood Moon” due to its reddish hue, the event occurs when Earth aligns between the Sun and the Moon, casting its shadow over the lunar surface. Unfortunately, this spectacle won’t be directly visible in Brazil, but enthusiasts can follow it through live streams on YouTube and social media. The eclipse will be most visible in Europe, Africa, eastern Australia, and New Zealand. As the second lunar eclipse of the year, it promises a breathtaking display for skywatchers and astronomy lovers worldwide.

This total lunar eclipse is a rare and captivating phenomenon, resulting from the perfect alignment of the Sun, Earth, and Moon. During totality, the Moon will be fully immersed in Earth’s umbra, the darkest part of its shadow, revealing its signature red color. For Brazilians, the next visible total lunar eclipse is set for March 3, 2026, observable across much of the Americas.

• What to expect: 82 minutes of totality with a reddish Moon.
• How to watch in Brazil: Live streams on platforms like YouTube.
• Next eclipse in Brazil: Scheduled for March 2026, visible in the Americas.

Details of the 2025 total lunar eclipse

The total lunar eclipse of September 2025 will unfold from 15:28 to 20:55 GMT (12:28 to 17:55 Brasília time). The totality phase, when the Moon is fully within the umbra, will occur between 17:30 and 18:52 GMT (14:30 to 15:52 Brasília time). During these 82 minutes, the eclipse will reach its peak, with the Moon glowing red.

Visibility will be optimal in regions like Europe, Africa, eastern Australia, and New Zealand. In cities such as Perth, Australia, the eclipse will be visible from 1:30 to 2:52 local time, while in Cairo, Egypt, it will occur from 20:30 to 21:52 EEST. For those wanting to catch the full event, start observing about 75 minutes before totality, when the Moon enters the penumbra.

• Perth, Australia: 1:30 to 2:52, early morning of September 8, 2025.
• Mumbai, India: 23:00 IST on September 7 to 00:22 IST on September 8.
• Cape Town, South Africa: 19:30 to 20:52 Brasília time on September 7.
• Tip for viewers: Begin watching 75 minutes before totality starts.

The phenomenon will progress through six distinct phases, starting with the Moon entering the penumbra and peaking during totality, when it’s fully covered by Earth’s shadow.

Why does the moon turn red?

The Moon’s reddish hue during a total lunar eclipse results from sunlight interacting with Earth’s atmosphere. Even when the Moon is shadowed, sunlight passes through the atmosphere, which scatters shorter wavelengths like blue and violet. Longer red wavelengths penetrate more easily, illuminating the Moon with a red glow, earning it the “Blood Moon” nickname.

Atmospheric conditions, such as dust or pollution, can intensify the red hue, making each eclipse visually unique. Astronomers note that volcanic particles in the atmosphere can further enhance the color, adding unpredictability to the spectacle.

• Cause of red color: Sunlight filtered through Earth’s atmosphere.
• Influencing factors: Dust and pollution can deepen the red tone.
• Unique visuals: Each eclipse varies in color intensity.

How to watch the eclipse in Brazil

Although the September 7, 2025, eclipse won’t be visible in Brazil, skywatchers can join live streams on platforms like YouTube. Channels from observatories, such as the National Observatory, and science communicators often broadcast the event in real time. Social media platforms like Instagram and X will also share videos and photos captured by observers in visible regions.

To ensure the best experience, check broadcast schedules in advance and opt for reliable sources. Some planetariums and universities may host virtual events with expert commentary to enhance understanding.

• Recommended platforms: YouTube, Instagram, and astronomy pages.
• Tip for Brazilians: Follow併

System: Follow live streams from international observatories.

• Virtual events: Planetariums may offer narrated broadcasts.
• Ideal timing: Tune in between 12:28 and 17:55 Brasília time.

Phases of the total lunar eclipse

The 2025 total lunar eclipse will go through six distinct phases. The penumbral eclipse begins as the Moon enters the lighter part of Earth’s shadow, causing a subtle darkening. The partial eclipse follows when a portion of the Moon enters the umbra, the darkest shadow.

During totality, the Moon is fully within the umbra, displaying its iconic red hue. As the Moon exits the umbra, the partial eclipse reverses, followed by the end of the penumbral phase, marking the conclusion of the event.

• Penumbral eclipse: Moon enters the lighter shadow, slightly dimming.
• Partial eclipse: Part of the Moon is covered by the umbra.
• Totality: Moon is fully in the umbra, glowing red.
• End of partial eclipse: Moon exits the umbra, returning to penumbra.
• End of penumbral eclipse: Moon leaves the shadow, ending the event.

Blood moon curiosities

The term “Blood Moon” comes from the Moon’s striking red appearance during totality. This phenomenon has inspired myths and stories across cultures, once seen as an omen but now celebrated as a scientific marvel. The 82-minute duration of the 2025 eclipse makes it the longest lunar eclipse of the year.

Visibility depends on clear skies in observable regions, adding an element of anticipation for viewers. The event’s unique color and cultural significance make it a global highlight.

• Name origin: Red hue resembles blood, hence “Blood Moon”.
• Record duration: 82 minutes, the longest eclipse of 2025.
• Cultural impact: Historically inspired myths and legends.

Next lunar eclipse in Brazil

Brazilians missing the 2025 eclipse can look forward to March 3, 2026, when a total lunar eclipse will be visible across the Americas, eastern Asia, Australia, and the Pacific. Clear skies and minimal light pollution will enhance the viewing experience.

While the naked eye is sufficient to enjoy the Blood Moon, binoculars or telescopes can provide a closer look at the lunar surface. Planning ahead for optimal viewing spots is recommended.

• Next eclipse date: March 3, 2026.
• Visible regions: Americas, eastern Asia, Australia, and Pacific.
• Viewing tip: Choose locations with clear skies and low light pollution.

Scientific significance of lunar eclipses

Beyond their visual appeal, lunar eclipses hold scientific value. They allow astronomers to study Earth’s atmosphere by analyzing the light that passes through it during the event. Eclipses also aid in calibrating astronomical instruments and refining lunar orbit calculations.

For the public, these events foster a connection with science and nature. Watching an eclipse, even virtually, sparks curiosity and highlights the importance of scientific outreach.

• Scientific value: Reveals data about Earth’s atmosphere and lunar orbit.
• Public engagement: Encourages interest in astronomy and science.
• Accessibility: Visible to the naked eye or through live streams.