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One study found that a not yet directly-observed, dust-modulating star or white dwarf of 1.17 ± 0.7 M ☉ at a distance of 8.60 ± 0.33 AU would be the most likely solution for Betelgeuse's 2170-day secondary periodicity, fluctuating radial velocity, moderate radius and low variation in effective temperature, as of 2024. [105]
The fact that there was a component of air that does not support combustion was clear to Rutherford, although he was not aware that it was an element. Nitrogen was also studied at about the same time by Carl Wilhelm Scheele , [ 13 ] Henry Cavendish , [ 14 ] and Joseph Priestley , [ 15 ] who referred to it as burnt air or phlogisticated air .