Septembre 2025 : Une éclipse de Lune au crépuscule

Septembre 2025 : Une éclipse de Lune au crépuscule

by Ciel & Espace

Formal & Physical Sciences Astronomy & Cosmology PGAstronomy, space and timePGSSolar system: the Sun and planets
🎙 Ciel & Espace 👥 41K 📅 August 29, 2025 ⏱ 28 min 👁 1K 📄 news review 🧭 2026-08-03
Available in: English (current) Français

Keywords

eclipseluneseptembre 2025observationSaturneVénus

Summary

This episode of Ciel & Espace’s monthly skywatching guide, presented by David Fossé with Cyril Birnbaum and Sébastien Fontaine, covers the notable celestial events of September 2025. The main highlight is a total lunar eclipse on September 7, visible in France only at moonrise, with the total phase beginning at 19:30 UT and lasting until 20:52 UT. The moon rises at 20:18, so observers will see only the end of totality, with a brief window of about 10 minutes of a reddish moon during nautical twilight. The hosts provide detailed timing and visibility tips, including photography advice. Other events include the moon passing near Saturn on September 9, near the Pleiades on September 13 (corrected from the 16th in an erratum), near Jupiter on September 16, an occultation of Venus by the moon on September 19 (visible in daylight), and Saturn at opposition on September 21. The episode also features a historical segment about astronomical sites in Paris’s 7th arrondissement, including the Cassini mansion, Laplace’s residence, Bailly’s execution site, and the Eiffel Tower’s astronomical connections. The hosts offer practical observation advice and highlight the beauty of these events.

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Critical Evaluation

The video provides a comprehensive and accurate overview of the month’s astronomical events, with a strong focus on the lunar eclipse. The hosts demonstrate deep knowledge and provide precise timings and visibility conditions for various locations in France. The explanation of the eclipse’s visibility is particularly clear, noting that the total phase begins before moonrise and that observers will only see the end of totality, with a short window of reddish moon during twilight. The advice on photography is practical and accessible. The historical segment adds cultural context, though it is somewhat tangential to the main astronomical content. The sources cited are limited to the magazine’s website, which is appropriate for a monthly guide. The erratum in the description shows a commitment to accuracy. The content is well-structured and engaging, with a good balance of information and entertainment. However, the technical level is moderate, suitable for amateur astronomers but not for experts. The video does not present original research but rather synthesizes known ephemerides. Overall, it is a reliable and valuable resource for skywatchers.

174 words

Title / Content Match

The title accurately reflects the main topic: the lunar eclipse of September 7, 2025, visible at twilight in France.

Quality & Reliability

8/10

The video is produced by a reputable astronomy magazine (Ciel & Espace) and features expert hosts. The information is accurate and well-explained, with clear timings and visibility conditions. The erratum in the description shows attention to detail. However, the content is primarily a monthly skywatching guide, not original research, and relies on established astronomical data.

Key Moments

Markers derived by PSI from the transcript: the creator did not define chapters.

Cited Sources

  • Ciel & Espace — Official website of the magazine, providing additional information and resources.

Concurring Sources

  • Ciel & Espace — The magazine's website likely contains ephemerides and articles consistent with the video's content.

Contribution & Novelties

The video offers a timely and detailed guide to September 2025’s celestial events, with a particular emphasis on the lunar eclipse’s visibility from France. It provides precise timings and practical advice for observation and photography, making it a valuable resource for amateur astronomers. The historical segment adds cultural depth, connecting astronomical heritage to modern observation.

Pour aller plus loin :

  • Lunar eclipse — Background on lunar eclipses and their types.
  • Occultation — Explanation of occultation events, such as the moon hiding Venus.
  • Pleiades — Information about the star cluster and its visibility.

92 words

Radar Profile

The radar profile shows high scores in information quantity, quality, and reliability, with a slightly lower technical level. This indicates a well-produced, informative video that is accessible to a broad audience, with strong factual accuracy.

Reliability 8/10