Word: spectrograph
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Dates: during 1980-1989
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Huchra, who made the telescopic observations for the Harvard-Smithsonian team, used an instrument called a spectrograph to break down each galaxy's light into its constituent colors. Within the spectrum he could see lines representing various elements in and around the galaxy's stars. These lines appear to be shifted toward the red end of the spectrum, depending on how fast the galaxy is moving and thus how far away from earth it is. By carefully measuring the degree of red shift, Huchra and Geller calculated the relative positions of the galaxies...
...them are part of a team that made headlines around the world this winter when it announced the discovery of what appeared to be new galaxies farther out in space and back in time than any other yet seen. Tonight they plan to use the experimental Red Channel Spectrograph, which "sees" deep red light when looking at a galaxy known as M82. Their "eyeball," the spectrograph, is supposed to analyze light that has passed through the telescope, pick out energy in the deep red frequencies coming from the galaxy, and display it on a television screen in symbols that...