Answer: sunspot

AnswerCrossword Clue
SUNSPOTSolar phenomenon.
sunspota dark spot on the surface of the sun
sunspotA spot or patch appearing from time to time on the sun's surface, appearing dark by contrast with its surroundings
SUNSPOTSolar dark patch
SUNSPOTSolar blot
SUNSPOTSolar blemish
SUNSPOTIt's got magnetic pull
SUNSPOTSource of disruption to satellites
SUNSPOTFreckle
SUNSPOTCelestial phenomenon.
SUNSPOTOn an 11-year cycle
SUNSPOTSpectrohelioscope viewing
SUNSPOTSolar storm
SUNSPOTFactor in shortwave reception
SUNSPOTShortwave-reception factor
SUNSPOTSolar event caused by magnetic activity
SUNSPOTSolar "blemish"
SUNSPOTSolar phenomenon
SUNSPOTOne may be 50,000 miles in diameter
SUNSPOTDark solar area