sunspot
Star's dark patch
A sunspot is a dark patch on the sun's surface, cooler than surrounding areas and associated with magnetic activity.
Sunspots appear and disappear in cycles, affecting solar radiation and occasionally disrupting communications on Earth.
Solar flares often erupt near sunspots.
Complete shadow region
- penumbraRegion of partial illumination
- photosphereStar's light-emitting surface
- chromosphereStellar atmospheric zone
- coronaStar's outermost atmosphere
solar flare · prominence · granulation · filament · solar wind · heliosphere · plasma · sunquake
Force zone around magnets
- polarityState of opposing forces
- fluxContinuous change or flow
- bipolarHaving two opposite poles
- field linesPaths depicting field strength
Localized skin darkening condition
- melaninNatural coloring compound
- freckleSmall pigmented skin spot
- discolorationAltered surface pigmentation
- UV exposureContact with ultraviolet light
umbra
Complete shadow region
- penumbraRegion of partial illumination
- photosphereStar's light-emitting surface
- chromosphereStellar atmospheric zone
corona · solar flare · prominence · granulation · filament · solar wind · heliosphere · plasma · sunquake · pore
magnetic field
Force zone around magnets
hyperpigmentation
Localized skin darkening condition
- melaninNatural coloring compound
- freckleSmall pigmented skin spot
- discolorationAltered surface pigmentation
UV exposure · photoaging · mottling · pigmentation · blemish
periodicity
Recurring at regular intervals
- stargazingtelescope, stargazing guides, night sky, stars, constellation
- space photosnebula, galaxy, supernova, black hole, star cluster
- stellar anatomycore, corona, chromosphere, photosphere, granulation
- stellar phenomenasupernova, nova, star formation, nuclear fusion, nucleosynthesis
- spacespace, moon, stars, star, Earth
- astronomy termseclipse, solar eclipse, lunar eclipse, star, meteor shower