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But Young and Harkness’s discovery was taken down in the 1930s, when scientists found out that the coronium line was actually produced by iron at extremely high temperatures.

They dubbed the new substance “coronium.”

In 1869 bright lines were found in the spectrum of the corona, one line in the green indicating the presence of an element not then known on the earth and hence called coronium.

One blank space, it is thought, may be filled some day by the gas coronium, which like helium has been discovered in the sun, but unlike it has not yet been detected here.

The name “coronium” has therefore been given to the supposed gas which forms it.