• sun spot cycle

सूर्य:    Surya sun Phoebus sol daystar luminary SUN

सूर्य कलंक:    sun spot sunspot sunspots

कलंक:    aspersion opprobrium reproach aspersions scandal

कलंक का:    black reprehensible

का:    presumably belonging to of by squander encode

आवर्तकाल:    period