comscore Oldest recorded solar eclipse occurred 3,200 years ago
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Oldest recorded solar eclipse occurred 3,200 years ago

Solar eclipses are often used as a fixed point to date events in the ancient world.

  • Published: October 30, 2017 11:42 AM IST
solar-eclipse-cover

Cambridge University researchers have pinpointed the date of what could be the oldest solar eclipse yet recorded. The event, which occurred on October 30, 1207 BC, is mentioned in the Bible, and could help historians to date Egyptian pharaohs. “Solar eclipses are often used as a fixed point to date events in the ancient world,” said Professor Colin Humphreys from University of Cambridge’s Department of Materials Science & Metallurgy. Also Read - First-ever image of 'monster' black hole captured

Using a combination of the biblical text and an ancient Egyptian text, the researchers were able to refine the dates of the Egyptian pharaohs, in particular, the dates of the reign of Ramesses the Great, according to the study published in the journal Astronomy & Geophysics. The biblical text in question comes from the Old Testament book of Joshua and has puzzled biblical scholars for centuries. It records that after Joshua led the people of Israel into Canaan, a region of the ancient Near East that covered modern-day Israel and Palestine – he prayed: “Sun, stand still at Gibeon, and Moon, in the Valley of Aijalon. And the Sun stood still, and the Moon stopped until the nation took vengeance on their enemies.” Also Read - Super Blood Wolf Moon, partial solar eclipse: Date, timings, where and how to watch in India

“If these words are describing a real observation, then a major astronomical event was taking place – the question for us to figure out is what the text actually means,” Humphreys said. “Modern English translations, which follow the King James translation of 1611, usually interpret this text to mean that the Sun and Moon stopped moving,” Humphreys said. “But going back to the original Hebrew text, we determined that an alternative meaning could be that the Sun and Moon just stopped doing what they normally do: they stopped shining. In this context, the Hebrew words could be referring to a solar eclipse, when the Moon passes between the earth and the Sun, and the Sun appears to stop shining,” Humphreys said. Also Read - Arecibo Message: Google Doodle celebrates 44th anniversary of the first interstellar message by humans; All you need to know

This interpretation is supported by the fact that the Hebrew word translated ‘stand still’ has the same root as a Babylonian word used in ancient astronomical texts to describe eclipses, he added. Independent evidence that the Israelites were in Canaan between 1500 and 1050 BC can be found in the Merneptah Stele, an Egyptian text dating from the reign of the Pharaoh Merneptah, son of the well-known Ramesses the Great, the study said. The large granite block, held in the Egyptian Museum in Cairo, says that it was carved in the fifth year of Merneptah’s reign and mentions a campaign in Canaan in which he defeated the people of Israel.

Earlier historians had used these two texts to try to date the possible eclipse, but were not successful as they were only looking at total eclipses, in which the disc of the Sun appears to be completely covered by the moon as the moon passes directly between the earth and the sun. What the earlier historians failed to consider was that it was instead an annular eclipse, in which the Moon passes directly in front of the Sun, but is too far away to cover the disc completely, the researchers said.

In the ancient world the same word was used for both total and annular eclipses. The researchers developed a new eclipse code, which takes into account variations in the Earth’s rotation over time. From their calculations, they determined that the only annular eclipse visible from Canaan between 1500 and 1050 BC was on 30 October 1207 BC, in the afternoon. If their arguments are accepted, it would not only be the oldest solar eclipse yet recorded, it would also enable researchers to date the reigns of Ramesses the Great and his son Merneptah to within a year. Using these new calculations, the reseachers determined that Ramesses the Great reigned from 1276-1210 BC, with a precision of plus or minus one year.

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  • Published Date: October 30, 2017 11:42 AM IST



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