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Since elements have several lines in a spectrum, a spectrum graph can show several inverted peaks for the same element. Also, elements with a lower flux than the average of the spectrum will have an upright peak (see the peak for helium). Which elements h...

According to the graph, and the other information provided about Arcturus, what non-metallic elements are still present in the star, even if in small quantities or at its periphery?

Scientists use a ratio that describes the relative amounts of each element when constructing composition-based images of celestial objects. Table 1 provides a model for how you can use flux data to calculate a whole number ratio for three elements (X, Y,...