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!]

Bird And Twig Branch Birdbath Sundial Sculpture Garden Bird Bath Feeder Spi HomeBird And Twig Branch Birdbath Sundial Sculpture Garden Bird Bath Feeder Spi Home $173.90 Vintage Painted Brass Sundial With Sun The Gracious Garden Andrea by Sadek 8"Vintage Painted Brass Sundial With Sun The Gracious Garden Andrea by Sadek 8" $32.00
Garden SundialGarden Sundial $59.25 Fishing Frog Birdbath Sundial Garden Bird Bath Sculpture ~ Spi HomeFishing Frog Birdbath Sundial Garden Bird Bath Sculpture ~ Spi Home $189.90
A.R Aronsson & Soner Vintage Garden SundialA.R Aronsson & Soner Vintage Garden Sundial $999.99 Vintage Brass Garden Sundial "Grow old along with me." Father Time & BirdVintage Brass Garden Sundial "Grow old along with me." Father Time & Bird $50.00
$29.99 Good Vintage Brass Bronze Garden Decor Sundial, Nice Patina, Marked EnglandGood Vintage Brass Bronze Garden Decor Sundial, Nice Patina, Marked England $20.49
Garden Path Water Element Pond Natural Stone Buntsandstein Sundial Lizard AldenGarden Path Water Element Pond Natural Stone Buntsandstein Sundial Lizard Alden $272.79 Garden Arrow 14" Diameter Armillary Sphere Sundial IronGarden Arrow 14" Diameter Armillary Sphere Sundial Iron $89.95
Angel Cherub Sunflower Sundial Pedestal Garden Decor Statue 14" Fiberglass ResinAngel Cherub Sunflower Sundial Pedestal Garden Decor Statue 14" Fiberglass Resin $100.00 Vintage Ceramic Sun Dial, Outdoor Garden Decor Hand Made Roman NumeralsVintage Ceramic Sun Dial, Outdoor Garden Decor Hand Made Roman Numerals $39.95
Garden Sundial ButterflyGarden Sundial Butterfly $37.00 Cast Iron Virginia Metalcrafters Garden Sundial "I Count Only Sunny Hours"Cast Iron Virginia Metalcrafters Garden Sundial "I Count Only Sunny Hours" $39.95
Whitehall Hummingbird Sundial Copper Verdi - Great Gift for Garden or HomeWhitehall Hummingbird Sundial Copper Verdi - Great Gift for Garden or Home $49.95 Dragonfly Garden Sundial On Flower Daisy Garden Decor ~ Spi Home 50727Dragonfly Garden Sundial On Flower Daisy Garden Decor ~ Spi Home 50727 $57.90
Garden Art Vintage Solid Brass Lotus Leaf Sundial With Attached FrogsGarden Art Vintage Solid Brass Lotus Leaf Sundial With Attached Frogs $19.99 Large 32" Armillary Sphere with Arrow for Home, Patio or Garden DecorLarge 32" Armillary Sphere with Arrow for Home, Patio or Garden Decor $129.95
Metal Sundial "I Count None But Sunny Hours" 3 Inch Garden Decor DecorationMetal Sundial "I Count None But Sunny Hours" 3 Inch Garden Decor Decoration $14.99 14”Diameter Iron metal Garden Arrow Armillary Sphere/Sundial Rustic14”Diameter Iron metal Garden Arrow Armillary Sphere/Sundial Rustic $119.95
Cast Iron Virginia Metalcrafters Garden Sundial "I Count Only Sunny Hours" 9.25"Cast Iron Virginia Metalcrafters Garden Sundial "I Count Only Sunny Hours" 9.25" $49.99 Garden Path Stream Pond Natural Stone Buntsandstein Sundial Lizard GekoGarden Path Stream Pond Natural Stone Buntsandstein Sundial Lizard Geko $237.18
Vintage Solid Brass Kiss Of Sundial Maritime Decor Art Garden NauticalVintage Solid Brass Kiss Of Sundial Maritime Decor Art Garden Nautical $629.51 Gardener's Reflection Sundial - Solid Brass w/Verdigris HighlightsGardener's Reflection Sundial - Solid Brass w/Verdigris Highlights $96.43
Sundials By Carson Horizontal 1996 Thyme To Garden Decor Herbs Roman NumeralsSundials By Carson Horizontal 1996 Thyme To Garden Decor Herbs Roman Numerals $41.99 Turtle Sundial How-To build Plans Wood+Metal Garden DecorTurtle Sundial How-To build Plans Wood+Metal Garden Decor $5.29
Frog Sundial Metal Glaze over Bisque Garden Toad Yard Art Cute Leap frog VtgFrog Sundial Metal Glaze over Bisque Garden Toad Yard Art Cute Leap frog Vtg $25.00 Iron metal Garden Arrow Armillary Sphere Sundial Rustic Multi ColorIron metal Garden Arrow Armillary Sphere Sundial Rustic Multi Color $119.99
15" Wrought Iron Sundial Garden Obleisk - Home and Garden Art15" Wrought Iron Sundial Garden Obleisk - Home and Garden Art $44.95 to Vintage metal Armillary Sundial Sphere w arrow for inside or garden etc 14" tallVintage metal Armillary Sundial Sphere w arrow for inside or garden etc 14" tall $74.99
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 Iron metal Garden Arrow Armillary Sphere Sundial Brown/Green Verdi in groundIron metal Garden Arrow Armillary Sphere Sundial Brown/Green Verdi in ground $99.99
8 1/4” vintage brass garden sundial, 6 lb8 1/4” vintage brass garden sundial, 6 lb $30.00 Vintage Ornate Sundial Garden Ornament Sunny Hours LargeVintage Ornate Sundial Garden Ornament Sunny Hours Large $74.95
Vintage Virginia Metalcrafters Garden Decor Sundial "I Count Only Sunny Hours"Vintage Virginia Metalcrafters Garden Decor Sundial "I Count Only Sunny Hours" $49.82 Flora & Fauna Father Time Garden Sundial model# Rome Rm2345 12.5" acrossFlora & Fauna Father Time Garden Sundial model# Rome Rm2345 12.5" across $65.99
Iron Circle Rosette Medallion Cast Iron Wrought GardenIron Circle Rosette Medallion Cast Iron Wrought Garden $48.00 Set of 3 Metal Sun Face Rustic Boho Bohemian Hippie Garden Patio Fence Decor 3DSet of 3 Metal Sun Face Rustic Boho Bohemian Hippie Garden Patio Fence Decor 3D $90.00
Solid Sphere Globe Garden Sundial ~Roman Numeral Detail~FunSolid Sphere Globe Garden Sundial ~Roman Numeral Detail~Fun $49.00 Sundial Garden Stake Home Decor Metal Yard Ornament Rustic ArtSundial Garden Stake Home Decor Metal Yard Ornament Rustic Art $39.95
Sundial Cast Iron 24 Armillary Garden Arrow Sphere/Yard/Lawn Fl House/Home DecorSundial Cast Iron 24 Armillary Garden Arrow Sphere/Yard/Lawn Fl House/Home Decor $90.49 New 12" H Cast Iron Sundial with Amber Glass Globe Garden / Home DecorNew 12" H Cast Iron Sundial with Amber Glass Globe Garden / Home Decor $31.00
Cast Aluminum Mermaid Armillary Sundial Garden Wind Compass Roman Numerals DecorCast Aluminum Mermaid Armillary Sundial Garden Wind Compass Roman Numerals Decor $339.99 Vtg Virginia Metalcrafters Sundial Bird Winged Hourglass Metal Garden Art DecorVtg Virginia Metalcrafters Sundial Bird Winged Hourglass Metal Garden Art Decor $85.00
Rusted Garden Sundial made by Artist Indoor/Outdoor Unique 2'x26"TallRusted Garden Sundial made by Artist Indoor/Outdoor Unique 2'x26"Tall $300.00 Iron metal Garden Arrow Armillary Sphere Sundial Rustic Antiqued BronzeIron metal Garden Arrow Armillary Sphere Sundial Rustic Antiqued Bronze $139.99
26" Sundial Armillary with Black Column Pedestal26" Sundial Armillary with Black Column Pedestal $777.00 Fine Swedish Bronze Iron Garden Armillary Sphere Hercules A.R Aronsson 48x24"Fine Swedish Bronze Iron Garden Armillary Sphere Hercules A.R Aronsson 48x24" $1,450.00
Garden Arrow Armillary SphereGarden Arrow Armillary Sphere $125.00
Click to see more Sundials items at www.ebay.com
Prices current as of last update, 01/25/21 3:14pm.

Home Contact Resources Exchange Links eBay