Solar observation in white light (the Solar photosphere ñ Sun spots, Solar granulation and Solar faculae) is one of the most interesting activities in astronomy.
Limb darkening of the Sun is a constant Solar phenomenon and immediately visible when aiming the telescope at the Sun. Limb darkening is caused by the fact that the Sun consists of hot gas whose temperature is reducing to- wards the surface. Looking at the middle of the Sun means to look onto the hottest and deepest region. Looking at the edge however shows less dense and consequently less bright regions. Were the Sun a solid body, no limb darkening could be observed.
Sun spots consist of a core region (Umbra) and a brighter surrounding region (Penumbra). Sun spots are cooler (approx. 8000°C) than the undisturbed Solar face. At this locations magnetic storms are bursting through the granu- lated photosphere.
All Sun spots go through a detailed cycle ñ normally from a small single spot evolving into a complex group of spots developing distinct magnetic north and south poles. Changes in these complex groups are the fastest moving changes observable in the Solar system. Complex changes may take just minutes, making the Solar observation in white light so very interesting.
Photospheric faculae. Faculae are being recognised as bright areas within the Solar surface and usually are grouped around Sun spots. These faculae regions are hotter than the rest of the Solar photosphere. During observation in integral light with a Herschel-Prism such bright regions are mainly visible near the limb of the Sun, since the area appears darker than the central regions.
The LUNT Solar-Wedge / Herschel-Wedge for refractor-telescopes uo to 150mm aperture with 2" focuser. Provides superior White Light views and images of the sun. Complete system with installed filter ND3.0!
The LUNT Solar-Wedge / Herschel-Wedge for refractor-telescopes uo to 150mm aperture with 1.25" focuser. Provides superior White Light views and images of the sun. Complete system with installed filter ND3.0!
2 Rosemary Lane, Sutton nr. Ely, Cambridgeshire, CB6 2NZ Telephone Hours: Monday to Friday - 10:00am-4:00pm Our showroom is currently closed for visits until further notice. Phone lines and e-mails are open as usual.
Primaluce Lab Control UnitsPiersExtension Tubes and PillarsAstrotracMotor Drives and ControllersMount AccessoriesCounterweightsPolarscopesEquatorial Wedges
Lunt H-alpha Solar TelescopesLunt Double Stacked TelescopesLunt H-alpha Solar FiltersLunt Blocking DiagonalsAdapter Plates for Lunt FiltersLunt Ca-K Solar Telescopes and Modules
DayStar Quark Eyepiece FiltersDaystar H-alpha Solar TelescopesDayStar H-alpha ION FiltersDayStar H-alpha Quantum SE and PE SeriesSolar, C+D-ERF FiltersCoronado Solar Telescopes and Filters
White Light FiltersHerschel PrismsAccessories for Solar ObservingLunt and Coronado Solar EyepiecesLunt Dovetail BarsSolarscopes Card ModelsSundials
William Optics EyepiecesVixen Eyepieces and Barlow LensesCelestron Eyepieces & Barlow LensesBaader Eyepieces & Barlow LensesSky-Watcher and OVL Eyepieces and Barlow LensesExplore Scientific EyepiecesMeade Eyepieces and BarlowsOrion USA Eyepieces & Barlow LensesPentax Super-Wide Angle EyepiecesAPM Eyepieces and BarlowsVernonscope Eyepieces and Barlows
Altair Astro Eyepieces and BarlowsLunt and Coronado Solar EyepiecesZoom EyepiecesSpecialist EyepiecesReticle EyepiecesRonchi Eyepieces
BinoviewersEyepiece and Accessory SetsEyepiece Bags and Cases2-1¼ AdaptersEyepiece ClampsRings and ExtendersEyepiece Accessories
Imaging Filters (Orion USA, Celestron, OVL and Sky-Watcher)Visual Filters (Orion USA, Sky-Watcher, OVL and Celestron)Filter Wheels and SlidersFilter Accessories
Limb darkening of the Sun is a constant Solar phenomenon and immediately visible when aiming the telescope at the Sun. Limb darkening is caused by the fact that the Sun consists of hot gas whose temperature is reducing to- wards the surface. Looking at the middle of the Sun means to look onto the hottest and deepest region. Looking at the edge however shows less dense and consequently less bright regions. Were the Sun a solid body, no limb darkening could be observed.
Sun spots consist of a core region (Umbra) and a brighter surrounding region (Penumbra). Sun spots are cooler (approx. 8000°C) than the undisturbed Solar face. At this locations magnetic storms are bursting through the granu- lated photosphere.
Photospheric faculae. Faculae are being recognised as bright areas within the Solar surface and usually are grouped around Sun spots. These faculae regions are hotter than the rest of the Solar photosphere. During observation in integral light with a Herschel-Prism such bright regions are mainly visible near the limb of the Sun, since the area appears darker than the central regions.
