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Position of the Sun, the Glossary

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.^[1]

96 relations: Aberration (astronomy), Amplitude, Analemma, Apsis, Astronomical Almanac, Astronomical unit, Astronomy, Atmospheric refraction, Axial tilt, Azimuth, Celestial equator, Celestial mechanics, Celestial pole, Celestial sphere, Circle of latitude, Circular orbit, Climatology, Clock, Culmination, December solstice, Declination, Diurnal motion, Earth, Earth System Research Laboratories, Earth's orbit, Earth's rotation, Ecliptic, Ecliptic coordinate system, Effect of Sun angle on climate, Elliptic orbit, Ephemeris, Epoch (astronomy), Equation of time, Equatorial coordinate system, Equinox, Fixed stars, Fortran, Fourier series, Geographic coordinate system, Globe, Horizontal coordinate system, Jet Propulsion Laboratory Development Ephemeris, Julian day, June solstice, Kepler orbit, Latitude, Line chart, Local mean time, Longitude, March equinox, ... Expand index (46 more) »
Dynamics of the Solar System

Aberration (astronomy)

In astronomy, aberration (also referred to as astronomical aberration, stellar aberration, or velocity aberration) is a phenomenon where celestial objects exhibit an apparent motion about their true positions based on the velocity of the observer: It causes objects to appear to be displaced towards the observer's direction of motion.

See Position of the Sun and Aberration (astronomy)

Amplitude

The amplitude of a periodic variable is a measure of its change in a single period (such as time or spatial period).

See Position of the Sun and Amplitude

Analemma

In astronomy, an analemma is a diagram showing the position of the Sun in the sky as seen from a fixed location on Earth at the same mean solar time, as that position varies over the course of a year. Position of the Sun and analemma are Dynamics of the Solar System.

See Position of the Sun and Analemma

Apsis

An apsis is the farthest or nearest point in the orbit of a planetary body about its primary body.

See Position of the Sun and Apsis

Astronomical Almanac

See Position of the Sun and Astronomical Almanac

Astronomical unit

The astronomical unit (symbol: au, or AU) is a unit of length defined to be exactly equal to.

See Position of the Sun and Astronomical unit

Astronomy

Astronomy is a natural science that studies celestial objects and the phenomena that occur in the cosmos.

See Position of the Sun and Astronomy

Atmospheric refraction

Atmospheric refraction is the deviation of light or other electromagnetic wave from a straight line as it passes through the atmosphere due to the variation in air density as a function of height.

See Position of the Sun and Atmospheric refraction

Axial tilt

In astronomy, axial tilt, also known as obliquity, is the angle between an object's rotational axis and its orbital axis, which is the line perpendicular to its orbital plane; equivalently, it is the angle between its equatorial plane and orbital plane.

See Position of the Sun and Axial tilt

Azimuth

An azimuth (from the directions) is the horizontal angle from a cardinal direction, most commonly north, in a local or observer-centric spherical coordinate system.

See Position of the Sun and Azimuth

Celestial equator

The celestial equator is the great circle of the imaginary celestial sphere on the same plane as the equator of Earth. Position of the Sun and celestial equator are Dynamics of the Solar System.

See Position of the Sun and Celestial equator

Celestial mechanics

Celestial mechanics is the branch of astronomy that deals with the motions of objects in outer space.

See Position of the Sun and Celestial mechanics

Celestial pole

The north and south celestial poles are the two points in the sky where Earth's axis of rotation, indefinitely extended, intersects the celestial sphere.

See Position of the Sun and Celestial pole

Celestial sphere

In astronomy and navigation, the celestial sphere is an abstract sphere that has an arbitrarily large radius and is concentric to Earth.

See Position of the Sun and Celestial sphere

Circle of latitude

A circle of latitude or line of latitude on Earth is an abstract east–west small circle connecting all locations around Earth (ignoring elevation) at a given latitude coordinate line.

See Position of the Sun and Circle of latitude

Circular orbit

A circular orbit is an orbit with a fixed distance around the barycenter; that is, in the shape of a circle.

See Position of the Sun and Circular orbit

Climatology

Climatology (from Greek κλίμα, klima, "slope"; and -λογία, -logia) or climate science is the scientific study of Earth's climate, typically defined as weather conditions averaged over a period of at least 30 years.

See Position of the Sun and Climatology

Clock

A clock or chronometer is a device that measures and displays time.

See Position of the Sun and Clock

Culmination

In observational astronomy, culmination is the passage of a celestial object (such as the Sun, the Moon, a planet, a star, constellation or a deep-sky object) across the observer's local meridian.

See Position of the Sun and Culmination

December solstice

The December solstice, also known as the southern solstice, is the solstice that occurs each December – typically on 21 December, but may vary by one day in either direction according to the Gregorian calendar.

See Position of the Sun and December solstice

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.

See Position of the Sun and Declination

Diurnal motion

Diurnal motion is an astronomical term referring to the apparent motion of celestial objects (e.g. the Sun and stars) around Earth, or more precisely around the two celestial poles, over the course of one day.

See Position of the Sun and Diurnal motion

Earth

Earth is the third planet from the Sun and the only astronomical object known to harbor life.

See Position of the Sun and Earth

Earth System Research Laboratories

The Earth System Research Laboratories (ESRL) is an alliance of four NOAA scientific labs, all located in the David Skaggs Research Center on the Department of Commerce campus in Boulder, Colorado.

See Position of the Sun and Earth System Research Laboratories

Earth's orbit

Earth orbits the Sun at an average distance of 149.60 million km (8.317 light minutes, 92.96 million mi) in a counterclockwise direction as viewed from above the Northern Hemisphere. Position of the Sun and Earth's orbit are Dynamics of the Solar System.

See Position of the Sun and Earth's orbit

Earth's rotation

Earth's rotation or Earth's spin is the rotation of planet Earth around its own axis, as well as changes in the orientation of the rotation axis in space. Position of the Sun and Earth's rotation are Dynamics of the Solar System.

See Position of the Sun and Earth's rotation

Ecliptic

The ecliptic or ecliptic plane is the orbital plane of Earth around the Sun. Position of the Sun and ecliptic are Dynamics of the Solar System.

See Position of the Sun and Ecliptic

Ecliptic coordinate system

In astronomy, the ecliptic coordinate system is a celestial coordinate system commonly used for representing the apparent positions, orbits, and pole orientations of Solar System objects.

See Position of the Sun and Ecliptic coordinate system

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 Earth varies by location, time of day, and season due to Earth's orbit around the Sun and Earth's rotation around its tilted axis.

See Position of the Sun and Effect of Sun angle on climate

Elliptic orbit

In astrodynamics or celestial mechanics, an elliptic orbit or elliptical orbit is a Kepler orbit with an eccentricity of less than 1; this includes the special case of a circular orbit, with eccentricity equal to 0.

See Position of the Sun and Elliptic orbit

Ephemeris

In astronomy and celestial navigation, an ephemeris (pl. ephemerides) is a book with tables that gives the trajectory of naturally occurring astronomical objects as well as artificial satellites in the sky, i.e., the position (and possibly velocity) over time.

See Position of the Sun and Ephemeris

Epoch (astronomy)

In astronomy, an epoch or reference epoch is a moment in time used as a reference point for some time-varying astronomical quantity.

See Position of the Sun and Epoch (astronomy)

Equation of time

The equation of time describes the discrepancy between two kinds of solar time. Position of the Sun and equation of time are Dynamics of the Solar System.

See Position of the Sun and Equation of time

Equatorial coordinate system

The equatorial coordinate system is a celestial coordinate system widely used to specify the positions of celestial objects.

See Position of the Sun and Equatorial coordinate system

Equinox

A solar equinox is a moment in time when the Sun crosses the Earth's equator, which is to say, appears directly above the equator, rather than north or south of the equator. Position of the Sun and equinox are Dynamics of the Solar System.

See Position of the Sun and Equinox

Fixed stars

In astronomy, the fixed stars (stellae fixae) are the luminary points, mainly stars, that appear not to move relative to one another against the darkness of the night sky in the background.

See Position of the Sun and Fixed stars

Fortran

Fortran (formerly FORTRAN) is a third generation, compiled, imperative programming language that is especially suited to numeric computation and scientific computing.

See Position of the Sun and Fortran

Fourier series

A Fourier series is an expansion of a periodic function into a sum of trigonometric functions.

See Position of the Sun and Fourier series

Geographic coordinate system

A geographic coordinate system (GCS) is a spherical or geodetic coordinate system for measuring and communicating positions directly on Earth as latitude and longitude.

See Position of the Sun and Geographic coordinate system

Globe

A globe is a spherical model of Earth, of some other celestial body, or of the celestial sphere.

See Position of the Sun and Globe

Horizontal coordinate system

The horizontal coordinate system is a celestial coordinate system that uses the observer's local horizon as the fundamental plane to define two angles of a spherical coordinate system: altitude and azimuth.

See Position of the Sun and Horizontal coordinate system

Jet Propulsion Laboratory Development Ephemeris

Jet Propulsion Laboratory Development Ephemeris (abbreviated JPL DE(number), or simply DE(number)) designates one of a series of mathematical models of the Solar System produced at the Jet Propulsion Laboratory in Pasadena, California, for use in spacecraft navigation and astronomy. Position of the Sun and Jet Propulsion Laboratory Development Ephemeris are Dynamics of the Solar System.

See Position of the Sun and Jet Propulsion Laboratory Development Ephemeris

Julian day

The Julian day is the continuous count of days since the beginning of the Julian period, and is used primarily by astronomers, and in software for easily calculating elapsed days between two events (e.g. food production date and sell by date).

See Position of the Sun and Julian day

June solstice

The June solstice is the solstice on Earth that occurs annually between 20 and 22 June according to the Gregorian calendar.

See Position of the Sun and June solstice

Kepler orbit

In celestial mechanics, a Kepler orbit (or Keplerian orbit, named after the German astronomer Johannes Kepler) is the motion of one body relative to another, as an ellipse, parabola, or hyperbola, which forms a two-dimensional orbital plane in three-dimensional space.

See Position of the Sun and Kepler orbit

Latitude

In geography, latitude is a coordinate that specifies the north–south position of a point on the surface of the Earth or another celestial body.

See Position of the Sun and Latitude

Line chart

A line chart or line graph, also known as curve chart, is a type of chart that displays information as a series of data points called 'markers' connected by straight line segments.

See Position of the Sun and Line chart

Local mean time

Local mean time (LMT) is a form of solar time that corrects the variations of local apparent time, forming a uniform time scale at a specific longitude.

See Position of the Sun and Local mean time

Longitude

Longitude is a geographic coordinate that specifies the east–west position of a point on the surface of the Earth, or another celestial body.

See Position of the Sun and Longitude

March equinox

The March equinox or northward equinox is the equinox on the Earth when the subsolar point appears to leave the Southern Hemisphere and cross the celestial equator, heading northward as seen from Earth. Position of the Sun and March equinox are Dynamics of the Solar System.

See Position of the Sun and March equinox

Mean anomaly

In celestial mechanics, the mean anomaly is the fraction of an elliptical orbit's period that has elapsed since the orbiting body passed periapsis, expressed as an angle which can be used in calculating the position of that body in the classical two-body problem.

See Position of the Sun and Mean anomaly

Mean longitude

Mean longitude is the ecliptic longitude at which an orbiting body could be found if its orbit were circular and free of perturbations.

See Position of the Sun and Mean longitude

Meridian (astronomy)

In astronomy, the meridian is the great circle passing through the celestial poles, as well as the zenith and nadir of an observer's location.

See Position of the Sun and Meridian (astronomy)

Meteorology

Meteorology is a branch of the atmospheric sciences (which include atmospheric chemistry and physics) with a major focus on weather forecasting.

See Position of the Sun and Meteorology

Modular arithmetic

In mathematics, modular arithmetic is a system of arithmetic for integers, where numbers "wrap around" when reaching a certain value, called the modulus.

See Position of the Sun and Modular arithmetic

Multiple (mathematics)

In mathematics, a multiple is the product of any quantity and an integer.

See Position of the Sun and Multiple (mathematics)

National Oceanic and Atmospheric Administration

The National Oceanic and Atmospheric Administration (abbreviated as NOAA) is a US scientific and regulatory agency charged with forecasting weather, monitoring oceanic and atmospheric conditions, charting the seas, conducting deep-sea exploration, and managing fishing and protection of marine mammals and endangered species in the US exclusive economic zone.

See Position of the Sun and National Oceanic and Atmospheric Administration

Navigation is a field of study that focuses on the process of monitoring and controlling the movement of a craft or vehicle from one place to another.

See Position of the Sun and Navigation

Newcomb's Tables of the Sun

Newcomb's Tables of the Sun (full title Tables of the Motion of the Earth on its Axis and Around the Sun) is a work by the American astronomer and mathematician Simon Newcomb, published in volume VI of the serial publication Astronomical Papers Prepared for the Use of the American Ephemeris and Nautical Almanac.

See Position of the Sun and Newcomb's Tables of the Sun

North

North is one of the four compass points or cardinal directions.

See Position of the Sun and North

North Pole

The North Pole, also known as the Geographic North Pole, Terrestrial North Pole or 90th Parallel North, is the point in the Northern Hemisphere where the Earth's axis of rotation meets its surface.

See Position of the Sun and North Pole

Orbital eccentricity

In astrodynamics, the orbital eccentricity of an astronomical object is a dimensionless parameter that determines the amount by which its orbit around another body deviates from a perfect circle.

See Position of the Sun and Orbital eccentricity

Orbital plane

The orbital plane of a revolving body is the geometric plane in which its orbit lies.

See Position of the Sun and Orbital plane

Ordinal date

An ordinal date is a calendar date typically consisting of a year and an ordinal number, ranging between 1 and 366 (starting on January 1), representing the multiples of a day, called day of the year or ordinal day number (also known as ordinal day or day number).

See Position of the Sun and Ordinal date

Parallax

Parallax is a displacement or difference in the apparent position of an object viewed along two different lines of sight and is measured by the angle or half-angle of inclination between those two lines.

See Position of the Sun and Parallax

Right ascension

Right ascension (abbreviated RA; symbol) is the angular distance of a particular point measured eastward along the celestial equator from the Sun at the March equinox to the (hour circle of the) point in question above the Earth.

See Position of the Sun and Right ascension

Right-hand rule

In mathematics and physics, the right-hand rule is a convention and a mnemonic, utilized to define the orientation of axes in three-dimensional space and to determine the direction of the cross product of two vectors, as well as to establish the direction of the force on a current-carrying conductor in a magnetic field.

See Position of the Sun and Right-hand rule

Season

A season is a division of the year based on changes in weather, ecology, and the number of daylight hours in a given region.

See Position of the Sun and Season

Sine wave

A sine wave, sinusoidal wave, or sinusoid (symbol: ∿) is a periodic wave whose waveform (shape) is the trigonometric sine function.

See Position of the Sun and Sine wave

Sky

The sky is an unobstructed view upward from the surface of the Earth.

See Position of the Sun and Sky

Solar azimuth angle

The solar azimuth angle is the azimuth (horizontal angle with respect to north) of the Sun's position.

See Position of the Sun and Solar azimuth angle

Solar energy

Solar energy is radiant light and heat from the Sun that is harnessed using a range of technologies such as solar power to generate electricity, solar thermal energy (including solar water heating), and solar architecture.

See Position of the Sun and Solar energy

Solar irradiance

Solar irradiance is the power per unit area (surface power density) received from the Sun in the form of electromagnetic radiation in the wavelength range of the measuring instrument.

See Position of the Sun and Solar irradiance

Solar time

Solar time is a calculation of the passage of time based on the position of the Sun in the sky.

See Position of the Sun and Solar time

Solar zenith angle

The solar zenith angle is the zenith angle of the sun, i.e., the angle between the sun’s rays and the vertical direction.

See Position of the Sun and Solar zenith angle

Solstice

A solstice is the time when the Sun reaches its most northerly or southerly excursion relative to the celestial equator on the celestial sphere. Position of the Sun and solstice are Dynamics of the Solar System.

See Position of the Sun and Solstice

South Pole

The South Pole, also known as the Geographic South Pole or Terrestrial South Pole, is the southernmost point on Earth and lies antipodally on the opposite side of Earth from the North Pole, at a distance of 20,004 km (12,430 miles) in all directions.

See Position of the Sun and South Pole

Spheroid

A spheroid, also known as an ellipsoid of revolution or rotational ellipsoid, is a quadric surface obtained by rotating an ellipse about one of its principal axes; in other words, an ellipsoid with two equal semi-diameters.

See Position of the Sun and Spheroid

Spring (season)

Spring, also known as springtime, is one of the four temperate seasons, succeeding winter and preceding summer.

See Position of the Sun and Spring (season)

Subsolar point

The subsolar point on a planet is the point at which its Sun is perceived to be directly overhead (at the zenith); that is, where the Sun's rays strike the planet exactly perpendicular to its surface.

See Position of the Sun and Subsolar point

Sun

The Sun is the star at the center of the Solar System.

See Position of the Sun and Sun

Sun path

Sun path, sometimes also called day arc, refers to the daily and seasonal arc-like path that the Sun appears to follow across the sky as the Earth rotates and orbits the Sun.

See Position of the Sun and Sun path

Sundial

A sundial is a horological device that tells the time of day (referred to as civil time in modern usage) when direct sunlight shines by the apparent position of the Sun in the sky.

See Position of the Sun and Sundial

Sunrise

Sunrise (or sunup) is the moment when the upper rim of the Sun appears on the horizon in the morning.

See Position of the Sun and Sunrise

Sunrise equation

The sunrise equation or sunset equation can be used to derive the time of sunrise or sunset for any solar declination and latitude in terms of local solar time when sunrise and sunset actually occur. Position of the Sun and sunrise equation are Dynamics of the Solar System.

See Position of the Sun and Sunrise equation

Sunset

Sunset (or sundown) is the disappearance of the Sun below the horizon of the Earth (or any other astronomical object in the Solar System) due to its rotation.

See Position of the Sun and Sunset

Surveying

Surveying or land surveying is the technique, profession, art, and science of determining the terrestrial two-dimensional or three-dimensional positions of points and the distances and angles between them.

See Position of the Sun and Surveying

Time

Time is the continued sequence of existence and events that occurs in an apparently irreversible succession from the past, through the present, and into the future.

See Position of the Sun and Time

Triangle wave

A triangular wave or triangle wave is a non-sinusoidal waveform named for its triangular shape.

See Position of the Sun and Triangle wave

Tropical year

A tropical year or solar year (or tropical period) is the time that the Sun takes to return to the same position in the sky – as viewed from the Earth or another celestial body of the Solar System – thus completing a full cycle of astronomical seasons.

See Position of the Sun and Tropical year

References

[1] https://en.wikipedia.org/wiki/Position_of_the_Sun

Also known as Declination of the Sun, Solar declination, Sun declination.

, Mean anomaly, Mean longitude, Meridian (astronomy), Meteorology, Modular arithmetic, Multiple (mathematics), National Oceanic and Atmospheric Administration, Navigation, Newcomb's Tables of the Sun, North, North Pole, Orbital eccentricity, Orbital plane, Ordinal date, Parallax, Right ascension, Right-hand rule, Season, Sine wave, Sky, Solar azimuth angle, Solar energy, Solar irradiance, Solar time, Solar zenith angle, Solstice, South Pole, Spheroid, Spring (season), Subsolar point, Sun, Sun path, Sundial, Sunrise, Sunrise equation, Sunset, Surveying, Time, Triangle wave, Tropical year, Universal Time, Uranus, West, Year, Zenith, Zigzag.

Position of the Sun, the Glossary

Table of Contents

See also

Dynamics of the Solar System

References