EP-107 Skylab: A Guidebook

Figure 132. Photograph of a portion of the sun, taken in the red light of the hydrogen alpha spectral line (625.3 nanometer or 6253 Å) Courtesy of California Institute of Technology Observatory at Big Bear Lake, California.

Figure 132. Photograph of a portion of the sun, taken in the red light of the hydrogen alpha spectral line (625.3 nanometer or 6253 Å) Courtesy of California Institute of Technology Observatory at Big Bear Lake, California.

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