Preface.- 1 Introduction.- 2 Carl Størmer\'s Origins.- 3 Størmer\'s Auroral Studies.- 4 Mother-of-Pearl-, Noctilucent Clouds, Comets and Metors.- 5 Botanical Interests.- 6 Mathematical Analyses.- 7 Cooperation and conflict with Kristian Birkeland.- 8 Størmer the Man.- 9 The Størmer Family.- 10 Størmer\'s Accomplishments: In Retrospect.- 11 Carl Størmer\'s publications, biographies, and other sources. Appendix 1 Størmer\'s Trajectory Analyses.- Appendix 2 Auroral Height and Position Orientations.- Bibliography.- Index of names.