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- Analemma abstract "In astronomy, an analemma (/ˌænəˈlɛmə/; from Greek ἀνάλημμα "pedestal of a sundial") is a curve representing the changing angular offset of a celestial body (usually the Sun) from its mean position on the celestial sphere as viewed from another celestial body (usually the Earth). The term is used when the observed body appears, as seen from the viewing body, to move in a way that is repeated at regular intervals, such as once a year or once a day. The analemma is then a closed curve, which does not change.Because of the Earth's annual revolution around the Sun in an orbit that is elliptical and tilted relative to the plane of the equator, an observer at a fixed point on the Earth sees the Sun appear to move in an analemma around a mean position, taking a year to do so. The mean position appears to revolve around the Earth once every mean solar day, because of the Earth's rotation. This daily revolution is not considered to be averaged out to get the mean. The mean position of the Sun is therefore at the same place in the sky at the same time every day, but not at other times. Therefore if the observed position of the Sun in the sky is plotted or photographed at the same time every day, or every few days, for a year, the points trace out the analemma.An alternative, equivalent description of the solar analemma is as a graph of the Sun's declination plotted against the equation of time.Some diagrams of the analemma are marked to show the positions of the Sun on it on various dates, a few days apart, throughout the year. With such date markings, diagrams of the analemma can be put to good use in calculating such things as the times of sunrise and sunset. Without date markings, images of the analemma are of little practical use, except as decoration.The word "analemma" is most commonly used to mean the analemma of the Sun's apparent motion, observed from a fixed position on the Earth as described above. Except where stated otherwise (mostly in items 5 and 6 of the table of contents), this common usage is employed in this article. For clarity, when the figure refers to the Sun, the term "solar analemma" is sometimes used in place of the single word "analemma".The analemma is an abstract concept. It has no physical existence except in diagrams and time-lapse photographs. Nevertheless, in common, convenient language, it is often described as if it were a real, visible celestial object. This common usage is followed in this article.".
- Analemma thumbnail Globenmuseum_Vienna_20091010_479.JPG?width=300.
- Analemma wikiPageExternalLink ap020709.html.
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- Analemma wikiPageExternalLink ap091220.html.
- Analemma wikiPageExternalLink ap101231.html.
- Analemma wikiPageExternalLink Analemmas.
- Analemma wikiPageExternalLink colorado-analemma.html.
- Analemma wikiPageExternalLink EquationOfTime.html.
- Analemma wikiPageExternalLink 1280px-Globenmuseum_Vienna_20091010_479.JPG.
- Analemma wikiPageExternalLink www.analemma.com.
- Analemma wikiPageExternalLink analemma.html.
- Analemma wikiPageExternalLink analemma.
- Analemma wikiPageExternalLink msg11062.html.
- Analemma wikiPageExternalLink tsy.pdf.
- Analemma wikiPageExternalLink planets.html.
- Analemma wikiPageExternalLink 1449.
- Analemma wikiPageExternalLink Astro-Solar-Analemma.htm.
- Analemma wikiPageExternalLink analemma_calc.html.
- Analemma wikiPageID "82379".
- Analemma wikiPageRevisionID "604679627".
- Analemma hasPhotoCollection Analemma.
- Analemma subject Category:Dynamics_of_the_Solar_System.
- Analemma subject Category:Solar_phenomena.
- Analemma subject Category:Sundials.
- Analemma type Artifact100021939.
- Analemma type Device103183080.
- Analemma type Instrument103574816.
- Analemma type Instrumentality103575240.
- Analemma type MeasuringInstrument103733925.
- Analemma type Object100002684.
- Analemma type PhysicalEntity100001930.
- Analemma type Sundial104355338.
- Analemma type Sundials.
- Analemma type Timepiece104437953.
- Analemma type Whole100003553.
- Analemma comment "In astronomy, an analemma (/ˌænəˈlɛmə/; from Greek ἀνάλημμα "pedestal of a sundial") is a curve representing the changing angular offset of a celestial body (usually the Sun) from its mean position on the celestial sphere as viewed from another celestial body (usually the Earth). The term is used when the observed body appears, as seen from the viewing body, to move in a way that is repeated at regular intervals, such as once a year or once a day.".
- Analemma label "Analema".
- Analemma label "Analema".
- Analemma label "Analemma".
- Analemma label "Analemma".
- Analemma label "Analemma".
- Analemma label "Analemma".
- Analemma label "Analemma".
- Analemma label "Analemme".
- Analemma label "Аналемма".
- Analemma label "أنالمة".
- Analemma label "アナレンマ".
- Analemma label "日行跡".
- Analemma sameAs Analema.
- Analemma sameAs Analemma.
- Analemma sameAs Analema.
- Analemma sameAs Analema.
- Analemma sameAs Analemme.
- Analemma sameAs Analemma.
- Analemma sameAs アナレンマ.
- Analemma sameAs 아날렘마.
- Analemma sameAs Analemma.
- Analemma sameAs Analemma.
- Analemma sameAs Analema.
- Analemma sameAs m.0l4r3.
- Analemma sameAs Q484737.
- Analemma sameAs Q484737.
- Analemma sameAs Analemma.
- Analemma wasDerivedFrom Analemma?oldid=604679627.
- Analemma depiction Globenmuseum_Vienna_20091010_479.JPG.
- Analemma isPrimaryTopicOf Analemma.
