Archive · 8 Dec 2025
Ancient Chinese Texts Reveal Solar Eclipse Insights
Scientists found old Chinese writings about a solar eclipse that happened a very long time ago.
This eclipse was on July 17, 709 BCE.
The writings were in a book called the Spring and Autumn Annals.
The scientists used these old writings and modern computers to learn more about how the Earth and the Sun looked back then.
They found that the eclipse wasn't seen from the place where the book was written, but from a place about 8 kilometers away.
This helped them understand how fast the Earth was spinning and how the Sun's outer layer, called the corona, looked during the eclipse.
The scientists think this is the oldest written description of the solar corona.
They also said that people back then wrote about these events because they thought they were important signs for their rulers.
Researchers used ancient Chinese texts to study a solar eclipse from 709 BCE.
The eclipse was recorded in the Spring and Autumn Annals, written centuries later.
A later note described the sun as 'completely yellow above and below,' possibly the earliest description of the solar corona.
The eclipse was not visible from Qufu, the capital of the Lu Duchy, but from a location about 8 kilometers away.
The study corrects previous errors in Earth's rotation speed and improves the accuracy of historical astronomical events.
- Who
- International team of researchers led by Hisashi Hayakawa
- What
- Discovered new insights on a solar eclipse using ancient Chinese texts
- When
- Eclipse occurred on July 17, 709 BCE; study published on December 2
- Where
- Qufu, Lu Duchy (ancient China)
- Why
- To understand changes in Earth's rotation and solar corona observations
- Eclipse Date
- July 17, 709 BCE
- Recorded In
- Spring and Autumn Annals
- Location
- Qufu, Lu Duchy
- Researchers
- Hisashi Hayakawa, Mitsuru Soma, Meng Jin
- Published In
- Astrophysical Journal Letters
- Publication Date
- December 2
- Correction Distance
- 8 kilometers
