DCI: High School Earth/Space Science - The Universe and Its StarsThe Universe and Its Stars - HS-ESS1.A.2: The study of stars' light spectra and brightness is used to identify compositional elements of stars, their movements, and their distances from Earth.
DCI: High School Physical Science - Electromagnetic RadiationElectromagnetic Radiation - HS-PS4.B.iv: Atoms of each element emit and absorb characteristic frequencies of light. These characteristics allow identification of the presence of an element, even in microscopic quantities.