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At certain phases of the variations, bright hydrogen lines are observed, overlaid with titanium oxide absorption.
Far ultraviolet (110 130 nm) features included oxygen and nitrogen, a bright hydrogen Lyman α emission, and ionized iron and magnesium emissions.
In 1937, Martyn, George Munro, and colleagues reported that bright hydrogen emissions on the solar disk occurred almost simultaneously with an increase in ionospheric D-region absorption (Martyn et al. 1937).
MWC 922 itself is an FS Canis Majoris variable, meaning that it is a Be star containing exceptionally bright hydrogen emission lines as well as select forbidden lines, likely due to the presence of a close binary.
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Shell's Santa Monica Boulevard station — which has conventional gasoline pumps as well as an odd-looking nozzle with bright blue "hydrogen" labels — is part of this strategy.
The spectrum of the planetary nebula is basically the same as that of the H II region; it contains bright lines from hydrogen and helium recombinations and the bright, collisionally excited forbidden lines and faint recombination lines of other ions.
"To achieve bright whites, we use hydrogen peroxide, instead of chlorine bleach," he said.
The sharp detail of the spiral's arms, defined by dark, dusty areas and bright, pink clouds of hydrogen, impressed the judges.
Imagine that as part of this program, wildlife preserves, nature parks, wilderness areas, and rain forests are regularly subjected to gigantic, blinding flashes of blinding light — flashes as bright as the flash from a hydrogen bomb.
The solution turned bright yellow when 3.0 ml of hydrogen peroxide (30%) was added.
So-called asymptotic giant branch stars are bright, aging suns that burn both hydrogen and helium, and astronomers have caught them manufacturing fluorine.
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