Not the earliest solar eclipse
Article Abstract:
The Ugaritic text Rs 12.061 is subjected to considerable discussion by semitists and historians. The book is interpreted as a picture of a solar eclipse which took place in the 14th or 13th century B.C. The text says that after the first visibility of the new Moon in Hiyyaru, Mars was visible at the setting of the sun during the first 6 days, and was invisible after the sixth day. It is believed that Mars would have appeared in the west along with the lunar crescent on the first day of Hiyyaru, and would have been visible for the first six days after it. The text insists on the 6-day visibility of Mass rather than referring to the heliacal setting of Mars.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1993
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Free oscillations illuminate the mantle
Article Abstract:
Frequency spectra of ground motion, from globally distributed seismic observatories, were analyzed by Resovsky and Ritzwoller, to model the heterogeneous elastic distribution of the Earth's mantle. Their models are based on normal modes, and the subducted slabs seem to be connected features across the transition zone and the mid-mantle, which is taken by the authors as evidence of the mantle convecting as a whole. Such a model is at odds with geochemical data of isotope concentrations, and the data favours a layered model of mantle convection without significant layer mixing.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1999
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Darkness can illuminate
Article Abstract:
Solar eclipses enable astronomers to study the sun's atmosphere that extends beyond its photospheric disk because diffraction limits observations' angular resolution when the sun is not in eclipse. Eclipses have allowed scientists to attain measurements of 5-8 arcseconds for the distance between the photospheric edge and the sun's atmosphere. However, many questions still remain concerning the dissipation of energy from the spicular material.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1992
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