Lewis, Isabel Martin, b. 1881 · New York, Duffield & Company · leaf 142
disturbed surfaceis again covered with the brilliant flecks or faculaewhich are regions of intensely high temperature.Frequently the disturbance breaks forth anew atthe same spot after a few days interval and an-other spot may appear exactly where the old onedisappeared. This appearance and… … THE GREAT NEBULA IN ORION (Photographed by Ritchey with the 2-ft. reflector of the Yerkes Observatory) SPLENDORS OF THE SKY an hour. This repulsion probably arises from thefact that a strong magnetic field exists in sun spots,adjacent spots frequently being of opposite po-larity. When a sun spot is…
Astronomy
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