Bible Encyclopedias
Coronium
1911 Encyclopedia Britannica
that constituent (otherwise unknown) of the sun's corona, which emits the characteristic green coronal ray, of which the wave-length is 5303.
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Bibliography Information
Chisholm, Hugh, General Editor. Entry for 'Coronium'. 1911 Encyclopedia Britanica. https://www.studylight.org/encyclopedias/eng/bri/c/coronium.html. 1910.