A vertical declining dial (south west) in Eyam Derbyshire England. 53°17′03″N 1°40′29″W / 53.28420, -1.67471Top view of an equatorial sundial.  The hour lines are spaced equally about the circle, and the shadow of the gnomon (a thin cylindrical rod) rotates uniformly.  The height of the gnomon is 5/12 the outer radius of the dial.  This animation depicts the motion of the shadow from 3 a.m. to 9 p.m. on mid-summer's day, when the sun is at its highest declination (roughly 23.5°).  Sunset and sunrise occur at 3am and 9pm, respectively, on that day at geographical latitudes near 57.5°, roughly the latitude of Aberdeen or Gothenburg.Benoy Sun Clock showing 6:00pm - 18.00 hoursAny celestial body, such as a star or the Sun, appears to rotate about the celestial axis over the course of a 24-hour day.  Over the course of the year, the stars keep their position on the celestial sphere, but the Sun and planets change their positions.  In particular, the Sun appears to move through the zodiac constellations.An East-facing polar dial in Doubs, France 47°30′N 6°48′E / 47.50, 6.80.  It receives no afternoon sunlight; the hour-lines near noon are spaced widely, as the sun's rays become parallel to the dial's face.
Discover great deals on the many hard to find and one of a kind items available only on eBay!

Sundials

A sundial is a device that measures time by the position of the Sun. In common designs such as the horizontal sundial, the sun casts a shadow from its style (a thin rod or a sharp, straight edge) onto a flat surface marked with lines indicating the hours of the day. more...

HomeHome
Bird & Wildlife AccessoriesBird & Wildlife Accessories
Garden DécorGarden Décor
Flags & FlagpolesFlags & Flagpoles
Garden StakesGarden Stakes
Gazing BallsGazing Balls
OtherOther
Plaques & SignsPlaques & Signs
Rain GaugesRain Gauges
Statues & Yard ArtStatues & Yard Art
Stepping Stones & RocksStepping Stones & Rocks
SundialsSundials
ThermometersThermometers
Water FeaturesWater Features
WeathervanesWeathervanes
Wind ChimesWind Chimes
WindmillsWindmills
Windsocks & DevasWindsocks & Devas
Garden Structures & FencingGarden Structures & Fencing
Gardening & PlantsGardening & Plants

As the sun moves across the sky, the shadow-edge progressively aligns with different hour-lines on the plate. Such designs rely on the style being aligned with the axis of the Earth's rotation. Hence, if such a sundial is to tell the correct time, the style must point towards true North (not magnetic North) and the style's angle with horizontal must equal the sundial's geographical latitude. However, many sundials do not fit this description, and operate on different principles.

Introduction

Sundials can be categorized in several ways. First, some sundials use a spot of light, or a line of light, to indicate the time, where others use the edge or tip of a shadow. In the former case, the spot of light may be formed by allowing the sun's rays through a small hole or reflecting them from a small circular mirror; a line of light may be formed by allowing the rays through a thin slit or focusing them through a cylindrical lens. In the other case, the shadow-casting object — the sundial's gnomon — may be a thin rod, or any object with a sharp tip or a straight edge. Second, sundials employ many types of gnomon. The gnomon may be fixed or moved according to the season; it may be oriented vertically, horizontally, aligned with the Earth's axis, or oriented in an altogether different direction determined by mathematics. Third, sundials may use many types of surfaces to receive the spot or line of light, the shadow-tip or shadow-edge. Planes are the most common surface, but partial spheres, cylinders, cones and even more complicated shapes have been used for greater accuracy or intriguing aesthetics. Fourth, sundials differ in their portability and their need of orientation. The installation of many dials requires knowing the local latitude, the precise vertical direction (e.g., by a level or plumb-bob), and the direction to true North. In contrast, other dials are self-aligning; for example, two dials that operate on different principles, such as a horizontal and analemmatic dial, may be mounted together on one plate, such that their times agree only when the plate is aligned properly. Sundials were an important aspect of the Greek and egypitan civilizations up to the 16th century.

Sundials indicate the local solar time, unless otherwise corrected. To obtain the standard clock time, three types of corrections need to be made. First, the solar time needs to be corrected for the longitu

Read more at Wikipedia.org


[List your site here Free!]

Frog Sundial - Copper VerdigrisFrog Sundial - Copper Verdigris $50.99 Vintage Cast Metal Sundial Garden Art 11" ~Grow Old With Me Best Is Yet To BeVintage Cast Metal Sundial Garden Art 11" ~Grow Old With Me Best Is Yet To Be $34.94
Rome Industries 1336 Brass Armillary SundialRome Industries 1336 Brass Armillary Sundial $233.45 $29.97
Vintage Solid Brass Sundial Maritime Sun Dial Metal Decor Art Garden Nautical Vintage Solid Brass Sundial Maritime Sun Dial Metal Decor Art Garden Nautical  $34.95 Rome B30 22 in. Cast Aluminum Spindle Pedestal Antique LeadRome B30 22 in. Cast Aluminum Spindle Pedestal Antique Lead $62.79
Sun and Moon SundialSun and Moon Sundial $73.99 Decorative Sundial Celestial Moon & Stars Cast Iron Yard DecorDecorative Sundial Celestial Moon & Stars Cast Iron Yard Decor $34.99
Vintage Sun Dial Brass "Grow Old Along With Me" Garden Outdoor Decor FeatureVintage Sun Dial Brass "Grow Old Along With Me" Garden Outdoor Decor Feature $85.00 Rome Moon & Stars Sundial - Solid Brass with Verdigris HighlightsRome Moon & Stars Sundial - Solid Brass with Verdigris Highlights $83.21
Garden Beauty Decorative Solid Brass Frog Garden Sundial New Kay Home ProductsGarden Beauty Decorative Solid Brass Frog Garden Sundial New Kay Home Products $25.00 Vintage As
00004000
trological Zodiac Mount Olympus #1920 Outdoor 14” Sundial Metal BrassVintage As 00004000 trological Zodiac Mount Olympus #1920 Outdoor 14” Sundial Metal Brass $79.99
Vintage Virginia Metalcrafters Sundial ~ I Count Only Sunny Hours ~ WaynesboroVintage Virginia Metalcrafters Sundial ~ I Count Only Sunny Hours ~ Waynesboro $37.00 Brass Bronze and Copper Armillary Sundial attributed to Sune RoothBrass Bronze and Copper Armillary Sundial attributed to Sune Rooth $1,250.00
Roman Sundial PedestalRoman Sundial Pedestal $50.99 Perpetual Calendar Sundial - Copper VerdigrisPerpetual Calendar Sundial - Copper Verdigris $50.99
10“ Metal Sundial Bird Feeder Decorative Garden Landscape10“ Metal Sundial Bird Feeder Decorative Garden Landscape $24.50 Bronze Sundial carried by Atlas - Garden decorBronze Sundial carried by Atlas - Garden decor $559.00
Whitehall Sun and Moon Large Sundial (Copper Verdi)Whitehall Sun and Moon Large Sundial (Copper Verdi) $41.99 Vintage Brass Sundial Eagle Count None But Sunny Hours 3 3/8"Vintage Brass Sundial Eagle Count None But Sunny Hours 3 3/8" $19.99
Cast Iron Sun Dial with Copper Verdi Finish ~ New Old StockCast Iron Sun Dial with Copper Verdi Finish ~ New Old Stock $28.50 Gothic Gargoyle Sundial Outdoor Garden Statue by Orlandi- 13 Finishes- 12" WideGothic Gargoyle Sundial Outdoor Garden Statue by Orlandi- 13 Finishes- 12" Wide $69.50
Vtg Cast Metal/ Copper Armillary Sundial Directional Base Antique Garden DecorVtg Cast Metal/ Copper Armillary Sundial Directional Base Antique Garden Decor $225.00 Vintage Ornate Sundial Garden Ornament Sunny Hours LargeVintage Ornate Sundial Garden Ornament Sunny Hours Large $74.95
Sun Dial Virginia Metal Crafters Only Sunny Hours Cast IronSun Dial Virginia Metal Crafters Only Sunny Hours Cast Iron $52.00 The Mariner's Sundial BronzeThe Mariner's Sundial Bronze $49.99
Armillary Sundial attributed to Sune RoothArmillary Sundial attributed to Sune Rooth $1,750.00 00004000 Vintage Wrought Iron and Brass Black Painted Sun Dial Lawn OrnamentVintage Wrought Iron and Brass Black Painted Sun Dial Lawn Ornament $45.00
vintage sundial Large Copper Base Metal Garden Armallary Yard Arrowvintage sundial Large Copper Base Metal Garden Armallary Yard Arrow $49.00 Flora & Fauna Garden Signature Series Hummingbird 11" Brass SundialFlora & Fauna Garden Signature Series Hummingbird 11" Brass Sundial $29.99
Outdoor Raised Sundial Clock Sunflower Metal & Aluminum Sun Dial Garden Decor UsOutdoor Raised Sundial Clock Sunflower Metal & Aluminum Sun Dial Garden Decor Us $213.99 Vintage Brass Sundial 11.25" ~ Grow Old Along With Me The Best Is Yet to BeVintage Brass Sundial 11.25" ~ Grow Old Along With Me The Best Is Yet to Be $49.00
Large Zodiac Sundial Lawn Garden Decor Outdoor Metal Sun Dial Clock OrnamentsLarge Zodiac Sundial Lawn Garden Decor Outdoor Metal Sun Dial Clock Ornaments $161.99 Virginia MetalCrafters Sun Dial and PedestalVirginia MetalCrafters Sun Dial and Pedestal $275.00
Decorative Dragonfly Sundial Lawn Garden Plaque Green Decor Cast Iron 9.75"Decorative Dragonfly Sundial Lawn Garden Plaque Green Decor Cast Iron 9.75" $23.33 Vintage Heavy 8.25" Brass Sundial [ I Count None But Sunny Hours ] Garden EagleVintage Heavy 8.25" Brass Sundial [ I Count None But Sunny Hours ] Garden Eagle $38.88
Decorative Iron Sundial W/ Zodiac Signs & Roman NumeralsDecorative Iron Sundial W/ Zodiac Signs & Roman Numerals $35.00 Cast Iron Sun Dial with ButterflyCast Iron Sun Dial with Butterfly $44.99
Vtg Brass Tempus Fugit Sun Dial Octagon Time Flies W Trillium Flower Shadow ArmVtg Brass Tempus Fugit Sun Dial Octagon Time Flies W Trillium Flower Shadow Arm $30.00 Hummingbird And Bee on Sunflower Sundial - Art Deco Garden DecorHummingbird And Bee on Sunflower Sundial - Art Deco Garden Decor $25.00
Cast Metal Dragonfly Garden SundialCast Metal Dragonfly Garden Sundial $24.99
Click to see more Sundials items at www.ebay.com
Prices current as of last update, 04/08/20 8:44am.

Home Contact Resources Exchange Links eBay