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68 relations: Analemma, Antarctic Circle, Arc (geometry), Arctic Circle, Astronomer, Cardinal direction, Celestial sphere, Counterintuitive, Culmination, Daylight, Daylighting, Daytime, Declination, Deep-sky object, Diurnal motion, Earth, Earth's orbit, Earth's rotation, Ecliptic, Effect of Sun angle on climate, Equator, Equinox, Geographical pole, Geometry, Heliodon, Heliostat, Hemispheres of Earth, Horizon, Latitude, Meridian (astronomy), Middle latitudes, Midnight sun, National Oceanic and Atmospheric Administration, Noon, North Pole, Northern Hemisphere, Passive solar building design, Polar circle, Polar night, Position of the Sun, Pyranometer, Pyrheliometer, Reinventing the wheel, Right angle, Season, Sky, Solar access, Solar azimuth angle, Solar energy, Solar furnace, ..., Solar gain, Solar thermal collector, Solar thermal energy, Solar tracker, Solar zenith angle, Solstice, South Pole, Southern Hemisphere, Subsolar point, Summer solstice, Sun, Tropic of Cancer, Tropic of Capricorn, Tropics, Twilight, United States Naval Observatory, Winter solstice, Zenith. Expand index (18 more) »
Analemma
In astronomy, an analemma (from Greek ἀνάλημμα analēmma "support") is a diagram showing the variation of the position of the Sun in the sky over the course of a year, as viewed at a fixed time of day and from a fixed location on the Earth.
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Antarctic Circle
The Antarctic Circle is the most southerly of the five major circles of latitude that mark maps of the Earth.
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Arc (geometry)
In Euclidean geometry, an arc (symbol: ⌒) is a closed segment of a differentiable curve.
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Arctic Circle
The Arctic Circle is the most northerly of the five major circles of latitude as shown on maps of Earth.
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Astronomer
An astronomer is a scientist in the field of astronomy who concentrates their studies on a specific question or field outside the scope of Earth.
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Cardinal direction
The four cardinal directions or cardinal points are the directions north, east, south, and west, commonly denoted by their initials N, E, S, and W. East and west are at right angles to north and south, with east being in the clockwise direction of rotation from north and west being directly opposite east.
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Celestial sphere
In astronomy and navigation, the celestial sphere is an abstract sphere with an arbitrarily large radius concentric to Earth.
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Counterintuitive
A counterintuitive proposition is one that does not seem likely to be true when assessed using intuition, common sense, or gut feelings.
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Culmination
In astronomy, the culmination of a planet, star, or constellation is its transit over an observer's meridian.
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Daylight
Daylight, or the light of day, is the combination of all direct and indirect sunlight during the daytime.
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Daylighting
Daylighting is the practice of placing windows, other openings, and reflective surfaces so that sunlight (direct or indirect) can provide effective internal lighting.
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Daytime
On Earth, daytime is roughly the period of the day during which any given point in the world experiences natural illumination from especially direct sunlight.
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Declination
In astronomy, declination (abbreviated dec; symbol δ) is one of the two angles that locate a point on the celestial sphere in the equatorial coordinate system, the other being hour angle.
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Deep-sky object
Deep-sky object (abbreviated as DSO) is a term designating any astronomical object that is not an individual star or Solar System object (such as Sun, Moon, planet, comet, etc.). The classification is used for the most part by amateur astronomers to denote visually observed faint naked eye and telescopic objects such as star clusters, nebulae and galaxies.
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Diurnal motion
Diurnal motion (lit, from dies, lit. "day") is an astronomical term referring to the apparent daily motion of stars around Earth, or more precisely around the two celestial poles.
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Earth
Earth is the third planet from the Sun and the only astronomical object known to harbor life.
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Earth's orbit
Earth's orbit is the trajectory along which Earth travels around the Sun.
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Earth's rotation
Earth's rotation is the rotation of Planet Earth around its own axis.
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Ecliptic
The ecliptic is the circular path on the celestial sphere that the Sun follows over the course of a year; it is the basis of the ecliptic coordinate system.
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Effect of Sun angle on climate
The amount of heat energy received at any location on the globe is a direct effect of Sun angle on climate, as the angle at which sunlight strikes the Earth varies by location, time of day, and season due to the Earth's orbit around the Sun and the Earth's rotation around its tilted axis.
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Equator
An equator of a rotating spheroid (such as a planet) is its zeroth circle of latitude (parallel).
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Equinox
An equinox is commonly regarded as the moment the plane (extended indefinitely in all directions) of Earth's equator passes through the center of the Sun, which occurs twice each year, around 20 March and 22-23 September.
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Geographical pole
A geographical pole is either of the two points on a rotating body (planet, dwarf planet, natural satellite, sphere...etc) where its axis of rotation intersects its surface.
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Geometry
Geometry (from the γεωμετρία; geo- "earth", -metron "measurement") is a branch of mathematics concerned with questions of shape, size, relative position of figures, and the properties of space.
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Heliodon
A heliodon (HEE-leo-don) is a device for adjusting the angle between a flat surface and a beam of light to match the angle between a horizontal plane at a specific latitude and the solar beam.
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Heliostat
A heliostat (from helios, the Greek word for sun, and stat, as in stationary) is a device that includes a mirror, usually a plane mirror, which turns so as to keep reflecting sunlight toward a predetermined target, compensating for the sun's apparent motions in the sky.
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Hemispheres of Earth
In geography and cartography, the hemispheres of Earth refer to any division of the globe into two hemispheres (from Ancient Greek ἡμισφαίριον hēmisphairion, meaning "half of a sphere").
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Horizon
The horizon or skyline is the apparent line that separates earth from sky, the line that divides all visible directions into two categories: those that intersect the Earth's surface, and those that do not.
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Latitude
In geography, latitude is a geographic coordinate that specifies the north–south position of a point on the Earth's surface.
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Meridian (astronomy)
In astronomy, the meridian is the great circle passing through the celestial poles, the zenith, and the nadir of an observer's location.
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Middle latitudes
The middle latitudes (also called the mid-latitudes, sometimes midlatitudes, or moderate latitudes) of Earth lie between 23°26'22" and 66°33'39" north, and between 23°26'22" and 66°33'39" south.
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Midnight sun
The midnight sun is a natural phenomenon that occurs in the summer months in places north of the Arctic Circle or south of the Antarctic Circle, when the sun remains visible at the local midnight.
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National Oceanic and Atmospheric Administration
The National Oceanic and Atmospheric Administration (NOAA; pronounced, like "Noah") is an American scientific agency within the United States Department of Commerce that focuses on the conditions of the oceans, major waterways, and the atmosphere.
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Noon
Noon (also midday or noon time) is 12 o'clock in the daytime, as opposed to midnight.
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North Pole
The North Pole, also known as the Geographic North Pole or Terrestrial North Pole, is (subject to the caveats explained below) defined as the point in the Northern Hemisphere where the Earth's axis of rotation meets its surface.
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Northern Hemisphere
The Northern Hemisphere is the half of Earth that is north of the Equator.
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Passive solar building design
In passive solar building design, windows, walls, and floors are made to collect, store, reflect, and distribute solar energy in the form of heat in the winter and reject solar heat in the summer.
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Polar circle
A polar circle is either the Arctic Circle or the Antarctic Circle.
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Polar night
The polar night occurs in the northernmost and southernmost regions of the Earth when the night lasts for more than 24 hours.
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Position of the Sun
The position of the Sun in the sky is a function of both the time and the geographic location of observation on Earth's surface.
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Pyranometer
A pyranometer is a type of actinometer used for measuring solar irradiance on a planar surface and it is designed to measure the solar radiation flux density (W/m2) from the hemisphere above within a wavelength range 0.3 μm to 3 μm.
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Pyrheliometer
A pyrheliometer is an instrument for measurement of direct beam solar irradiance.
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Reinventing the wheel
To reinvent the wheel is to duplicate a basic method that has already previously been created or optimized by others.
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Right angle
In geometry and trigonometry, a right angle is an angle of exactly 90° (degrees), corresponding to a quarter turn.
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Season
A season is a division of the year marked by changes in weather, ecology, and amount of daylight.
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Sky
The sky (or celestial dome) is everything that lies above the surface of the Earth, including the atmosphere and outer space.
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Solar access
Solar access is the ability of one property to continue to receive sunlight across property lines without obstruction from another’s property (buildings, foliage or other impediment).
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Solar azimuth angle
The solar azimuth angle is the azimuth angle of the Sun's position.
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Solar energy
Solar energy is radiant light and heat from the Sun that is harnessed using a range of ever-evolving technologies such as solar heating, photovoltaics, solar thermal energy, solar architecture, molten salt power plants and artificial photosynthesis.
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Solar furnace
A solar furnace is a structure that uses concentrated solar power to produce high temperatures, usually for industry.
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Solar gain
Solar gain (also known as solar heat gain or passive solar gain) refers to the increase in thermal energy of a space, object or structure as it absorbs incident solar radiation.
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Solar thermal collector
A solar thermal collector collects heat by absorbing sunlight.
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Solar thermal energy
Solar thermal energy (STE) is a form of energy and a technology for harnessing solar energy to generate thermal energy or electrical energy for use in industry, and in the residential and commercial sectors.
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Solar tracker
A solar tracker is a device that orients a payload toward the Sun.
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Solar zenith angle
The solar zenith angle is the angle between the zenith and the centre of the Sun's disc.
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Solstice
A solstice is an event occurring when the Sun appears to reach its most northerly or southerly excursion relative to the celestial equator on the celestial sphere.
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South Pole
The South Pole, also known as the Geographic South Pole or Terrestrial South Pole, is one of the two points where the Earth's axis of rotation intersects its surface.
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Southern Hemisphere
The Southern Hemisphere is the half of Earth that is south of the Equator.
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Subsolar point
The subsolar point on a planet is where its sun is perceived to be directly overhead (in zenith); that is where the sun's rays are hitting the planet exactly perpendicular to its surface.
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Summer solstice
The summer solstice (or estival solstice), also known as midsummer, occurs when one of the Earth's poles has its maximum tilt toward the Sun.
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Sun
The Sun is the star at the center of the Solar System.
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Tropic of Cancer
The Tropic of Cancer, also referred to as the Northern Tropic, is the most northerly circle of latitude on Earth at which the Sun can be directly overhead.
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Tropic of Capricorn
The Tropic of Capricorn (or the Southern Tropic) is the circle of latitude that contains the subsolar point on the December (or southern) solstice.
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Tropics
The tropics are a region of the Earth surrounding the Equator.
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Twilight
Twilight on Earth is the illumination of the lower atmosphere when the Sun itself is not directly visible because it is below the horizon.
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United States Naval Observatory
The United States Naval Observatory (USNO) is one of the oldest scientific agencies in the United States, with a primary mission to produce Positioning, Navigation and Timing (PNT) for the United States Navy and the United States Department of Defense.
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Winter solstice
The winter solstice (or hibernal solstice), also known as midwinter, is an astronomical phenomenon marking the day with the shortest period of daylight and the longest night of the year.
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Zenith
The zenith is an imaginary point directly "above" a particular location, on the imaginary celestial sphere.
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Redirects here:
Geocentric view of the seasons, Sun Path, Sun path diagram.
References
[1] https://en.wikipedia.org/wiki/Sun_path
