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Winter starlight and spectral classes explained
Astronomy columnist J. Clayton Troeger guides readers through spectral classes from O to M, explains how spectra reveal star temperatures, and invites readers to a January stargazing contest with a prize subscription to Abrams Planetarium Sky Calendar. He notes notable dates for Jupiter Saturn, meteor showers, and lunar phases.
MENTIONED IN THIS ARTICLE
J. Clayton Troeger
Heavenly Dome
16Th St
Ames
Iowa
Abrams Planetarium
Jupiter
Saturn
Venus