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Line 2: These [[emission line]]s were first discovered in the spectrums of planetary nebulae in the 1860s. At that time, they were thought to be due to a new element which was named '[[Nebulium]]'. After more than 50 years, [[Ira Sprague Bowen]] came up with the current explanation of them being due to doubly ionized oxygen. {{science-stub}} [[category:spectroscopy]]

Doubly ionized oxygen: Difference between revisions