Definition that contains sunspot
- quiet (of the sun) characterized by a low level of surface phenomena, such as sunspots
- active (of the sun) characterized by an increased occurrence of sunspots and flares and radio emissions
- mitchell United States astronomer who studied sunspots and nebulae (1818-1889)
- flare a sudden eruption of intense high-energy radiation from the sun's surface; associated with sunspots and radio interference
- hale United States astronomer who discovered that sunspots are associated with strong magnetic fields (1868-1938)
- facula a large bright spot on the sun's photosphere occurring most frequently in the vicinity of sunspots
- george ellery hale United States astronomer who discovered that sunspots are associated with strong magnetic fields (1868-1938)
- solar flare a sudden eruption of intense high-energy radiation from the sun's surface; associated with sunspots and radio interference
- maria mitchell United States astronomer who studied sunspots and nebulae (1818-1889)
- solar facula a large bright spot on the sun's photosphere occurring most frequently in the vicinity of sunspots