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Angle between the two sightlines or two objects as viewed from an observer
Angular distance or angular separation is the measure of the angle between the orientation of two straight lines, rays, or vectors – typically in three-dimensional
Angular_distance
Similarity measure for number sequences
}}} angular similarity = S θ := 1 − angular distance = 1 − θ π {\displaystyle {\text{angular similarity}}=S_{\theta }:=1-{\text{angular distance}}=1-{\frac
Cosine_similarity
Astronomical concept
In astronomy, angular diameter distance is a distance (in units of length) defined in terms of an object's physical size (also in units of length), x
Angular_diameter_distance
Ability of any image-forming device to distinguish small details of an object
to have a high resolution or high angular resolution, it means that the perceived distance, or actual angular distance, between resolved neighboring objects
Angular_resolution
How large a sphere or circle appears
The angular diameter, angular width, angular size, apparent diameter, or apparent size is an angular separation (in units of angle) describing how large
Angular_diameter
Turning force around an axis
definition of power: power = force ⋅ linear distance time = ( torque r ) ⋅ ( r ⋅ angular speed ⋅ t ) t = torque ⋅ angular speed . {\displaystyle
Torque
Angular distance between the Moon and another celestial body
navigation, lunar distance, also called a lunar, is the angular distance between the Moon and another celestial body. The lunar distances method uses this
Lunar_distance_(navigation)
Angular measurement, thousandth of a radian
mrad, sometimes also abbreviated mil or mils) is an SI derived unit for angular measurement which is defined as a thousandth of a radian (0.001 radian)
Milliradian
Rate of change of angle
In physics, angular frequency (symbol ω), also called angular speed and angular rate, is a scalar measure of the angle rate (the angle per unit time)
Angular_frequency
In astronomy, angular separation between the Sun and a planet
the angular distance of the Moon relative Earth or the natural satellite of another planet from its central planet, for instance the angular distance of
Elongation_(astronomy)
Supernova in the constellation Taurus; visible from 1054 to 1056
ones. Three accounts are apparently related because they describe the angular distance from the guest star to Zeta Tauri as "perhaps several inches away"
SN_1054
Displacement measured angle-wise when a body is showing circular or rotational motion
infinitesimal rotations are applied is irrelevant. Angular distance Angular frequency Angular position Angular velocity Azimuth Rotation matrix § Infinitesimal
Angular_displacement
Tool for angle measurement
sextant is a doubly reflecting navigation instrument that measures the angular distance between two visible objects. The primary use of a sextant is to measure
Sextant
Northern pole-star; brightest star in Ursa Minor
parallax; see #Distance Their minimum spatial separation is the angular separation: 0.09 mrad (18.2 arcseconds), i.e. 0.009% of their distance from Earth;
Polaris
Conserved physical quantity; rotational analogue of linear momentum
particle and its distance from origin. The spin angular momentum vector of a rigid body is proportional but not always parallel to the spin angular velocity vector
Angular_momentum
Mathematical space with a notion of distance
Euclidean space with its usual notion of distance. Other well-known examples are a sphere equipped with the angular distance and the hyperbolic plane. A metric
Metric_space
Polarization pattern of the daytime sky
the three angular distances. In an altitude-azimuth grid the angular distance between the observed pointing and the Sun and the angular distance between
Rayleigh_sky_model
Observation of distant objects on Earth's surface or terrestrial features
because of their angular width. The location of the observed object plays an important role, making it visible or not even from a small distance. The best visible
Long_distance_observations
Celestial coordinate system
equatorial coordinate system Σ(α, δ) in astronomy, polar distance (PD) is an angular distance of a celestial object on its meridian measured from the celestial
Polar_distance_(astronomy)
Imaginary point directly above a particular location, on the imaginary celestial sphere
the direction of reference for measuring the zenith angle (or zenith angular distance), the angle between a direction of interest (e.g. a star) and the local
Zenith
Topics referred to by the same term
sphere or circle appears from a given point of view Angular diameter distance, used in astronomy Angular Recording Corporation, a British independent record
Angular
Linear or angular distance that an object can move while attached to another
Range of motion (or ROM) is the linear or angular distance that a moving object may normally travel while properly attached to another. In biomechanics
Range_of_motion
Physical quantity
kinematics, angular acceleration (symbol α, alpha) is the time derivative of angular velocity. Following the two types of angular velocity, spin angular velocity
Angular_acceleration
Specifies the orbit of an object in space
position of that body in the classical two-body problem. It is the angular distance from the pericenter which a fictitious body would have if it moved
Mean_anomaly
Shortest distance between two points on the surface of a sphere
The great-circle distance, orthodromic distance, or spherical distance is the distance between two points on a sphere, measured along the great-circle
Great-circle_distance
Celestial coordinate system used to specify the positions of celestial objects
declination symbol δ, (lower case "delta", abbreviated DEC) measures the angular distance of an object perpendicular to the celestial equator, positive to the
Equatorial_coordinate_system
Angle the planets make to each other in the horoscope
astrological interest. As viewed from Earth, aspects are measured by the angular distance in degrees and minutes of ecliptic longitude between two points. According
Astrological_aspect
Astronomical equivalent of longitude
In astronomy, Right ascension (abbreviated RA; symbol α) is the angular distance of a particular point measured eastward along the celestial equator from
Right_ascension
Method of determining the direction of Mecca
negligible deviation. A practical problem occurs in locations whose angular distances to Mecca are almost equal to 90 degrees at the edge of the hemisphere
Qibla_observation_by_shadows
objects, as determined from their angular separation and estimated distance. For planets and double stars, this distance is usually given in astronomical
Glossary_of_astronomy
Adaptation of the standard Mercator projection
false easting, E0, is the distance of the true grid origin east of the false origin. The false northing, N0, is the distance of the true grid origin north
Transverse Mercator projection
Transverse_Mercator_projection
Astronomical coordinate analogous to latitude
In astronomy, declination (abbreviated dec; symbol δ) is the angular distance from the celestial equator on the celestial sphere; when paired with right
Declination
SI derived unit of angle
in the International System of Units (SI) and is the standard unit of angular measure used in many areas of mathematics. It is defined such that one
Radian
Relative direction using a dial
numbers are relative to the direction in which the vessel points. The angular distance between adjacent clock numbers is 30 degrees, a round unit that simplifies
Clock_position
Conjunction of the planets Jupiter and Saturn
smaller. Distance is the angular separation between the planets in sixtieths of a degree (minutes of arc) and elongation is the angular distance from the
Great_conjunction
Fortnight or a lunar phase in a month of the Hindu lunar calendar
Amavasya corresponds to the period when the Moon is within 12 degrees of angular distance from the Sun before their conjunction. A lunar month begins on the
Paksha
Cosmological formulas for expanding universe
_{k}<0\end{cases}}} Angular diameter distance: d A ( z ) = d M ( z ) 1 + z {\displaystyle d_{A}(z)={\frac {d_{M}(z)}{1+z}}} Luminosity distance: d L ( z ) =
Distance_measure
Galaxy in the constellation Virgo
extended from the core at a position angle of 260° to an angular distance of 20″ with an angular width of 2″. In 1969–1970, a strong component of the radio
Messier_87
Process of enlarging the apparent size of something
apparent (angular) size as seen via instrument and the angular size of the object when the object is placed at the conventional closest distance of distinct
Magnification
Unit of length in astronomy
distance of 61 Cygni. The parallax of a star is defined as half of the angular distance that a star appears to move relative to the celestial sphere as Earth
Parsec
Celestial coordinate system used to describe Solar System objects
celestial longitude (symbols: heliocentric ℓ, geocentric λ) measures the angular distance of an object along the ecliptic from the primary direction. Like right
Ecliptic_coordinate_system
Third-largest asteroid
conjunctions to stars that other solar objects always pass at great angular distance. This resulted in Pallas passing Sirius on 9 October 2022, only 8.5
2_Pallas
Time that marks the beginning of twilight before sunrise
morning twilight is divided in three phases, which are determined by the angular distance of the centre of the Sun (degrees below the horizon) in the morning
Dawn
Specialized eyepiece
yields the angular distance between the two points seen in a telescope. In a microscope, a similar calculation yields the spatial distance between two
Filar_micrometer
{\displaystyle D} is the mean angular distance of the Moon from the Sun (its elongation), and ℓ {\displaystyle \ell } is the mean angular distance of the Moon from
Evection
Atmospheric optical phenomenon
with sun dogs is the 22° halo, which forms a ring at roughly the same angular distance from the sun as the sun dogs, thus appearing to interconnect them.
Sun_dog
Statistical tool to assess investments
correlation matrix) and we need to transform it into a distance matrix (such as angular distance) so that elements that are very similar to each other
Deflated_Sharpe_ratio
Trojan moon of Saturn
radial distance from Saturn in its perturbed eccentric orbit. Polydeuces's apparent looping motion combined with its librating angular distance from Dione
Polydeuces_(moon)
Computer graphics technique
media Atmospheric visual properties such as: Day-night cycle Elevation Angular distance from the Sun or Moon or other orbital objects Weather and sky conditions
Physically_based_rendering
Process of monitoring and controlling the movement of a craft or vehicle
Great circle, etc). Roughly, the latitude of a place on Earth is its angular distance north or south of the equator. Latitude is usually expressed in degrees
Navigation
Atmospheric illumination by the Sun below the horizon
winter side of the equinoxes. Outside the polar circles, where the angular distance from the polar circle is less than the angle which defines twilight
Twilight
Concept in orbital mechanics
orbit is generally inclined to the ecliptic, therefore define the angular distance from ♈︎ to the place where the orbit crosses the ecliptic from south
Mean_longitude
The Moon's circuit around Earth
greater orbital angular momentum causes the Earth–Moon distance to increase at approximately 38 millimetres per year. Conservation of angular momentum means
Orbit_of_the_Moon
Astronomical instrument for timing of the passage of stars
event known as a culmination, while at the same time measuring their angular distance from the nadir. These are special purpose telescopes mounted so as
Meridian_circle
Cinema sound system
front channels are useful for very large cinema auditoriums where the angular distance between center and left/right channels may be considerable. SDDS decoders
Sony_Dynamic_Digital_Sound
Principles to describe the practical behavior of colors
paints will produce darkened violets and purples, even though the angular distance separating the magenta and cyan is the same as that between the red
Color_theory
Class of navigational instruments
permits one to observe two objects simultaneously while measuring the angular distance between the objects. While reflecting instruments are used in many
Reflecting_instrument
Time between successive new moons
must move a little further to reach the new position having the same angular distance from the Sun, appearing to move with respect to the stars since the
Lunar_month
Brightest quasar from Earth located in the constellation Virgo
interferometer yields an angular distance estimate of DA=1.80+0.32 −0.28 Gly (552+97 −79 Mpc). The latter distance is related to the comoving distance as D L = ( 1
3C_273
decreasing to 30° north at the outer edge. Sidereal hour angle is shown as the angular coordinate, starting at 0° at the left of the chart, and increasing counter-clockwise
List_of_stars_for_navigation
Bright spot on a lunar halo
bending the moonlight by about 22°, so the moon dogs appear at that angular distance from the Moon. Because the light of the Moon is fainter than that of
Moon_dog
Methods to identify locations on the Sun
Stonyhurst and Carrington systems. They both define latitude as the angular distance from the solar equator, but differ in how they define longitude. In
Solar_coordinate_systems
Theoretical description of motion of Earth's moon
the distance (and apparent diameter) of the Moon appear to vary by a factor of about 2, which is clearly not seen in reality. (The apparent angular diameter
Lunar_theory
Differential rotation of the Sun
heliographic longitude of a solar feature conventionally refers to its angular distance relative to the central meridian crossed by the Sun-Earth radial line
Solar_rotation
Direction and rate of rotation
kinematics, angular velocity (symbol ω or ω → {\displaystyle {\vec {\omega }}} , the lowercase Greek letter omega), also known as the angular frequency
Angular_velocity
Red supergiant star in the constellation Orion
distance. Knowledge of the star's distance improves the accuracy of other stellar parameters, such as luminosity that, when combined with an angular diameter
Betelgeuse
Flight or sailing route along the shortest path between two points on a globe's surface
= R θ s , t {\displaystyle d_{s,t}=R\theta _{s,t}} where θ is the angular distance of two points viewed from the center of the sphere, measured in radians
Great-circle_navigation
Dwarf planet in the Kuiper belt
to negative. "hEcl-Lat" is the heliocentric ecliptic latitude, or angular distance above the ecliptic.) "JPL Horizons On-Line Ephemeris for 136472 Makemake
Makemake
Sphere with radius one, usually centered on the origin of the space
length on the unit circle is called radians and used for measuring angular distance; in spherical trigonometry surface area on the unit sphere is called
Unit_sphere
Angle between two radii of a circle
also known as the arc's angular distance. The arc length spanned by a central angle on a sphere is called spherical distance. The size of a central angle
Central_angle
Red supergiant star in the constellation Cepheus
made based on its angular diameter and an assumed distance of 2,400 light years gives it a radius of 1,650 R☉, however the angular diameter used later
Mu_Cephei
Optical surveying instrument
the different distances to the target. Sightings are taken by the surveyor, who adjusts the telescope's vertical and horizontal angular orientation so
Theodolite
Optical characteristics of the atmosphere
light in particular directions. For circular halos, the preferred angular distance are 22 and 46 degrees from the ice crystals which create them. Atmospheric
Atmospheric_optics
Fourteenth-century Korean star map
projection : the linear distance of an object on the map from the center is lineally proportional to the north polar angular distance.[original research?]
Cheonsang_Yeolcha_Bunyajido
Star in the constellation Canis Major
position angle of 161° of the main star. Despite the relatively large angular distance the components can only be resolved in large telescopes, since the
Epsilon_Canis_Majoris
Kuiper belt object
is the angular distance eastward of the celestial equator starting at the vernal (March) equinox while the declination is the angular distance perpendicular
20000_Varuna
Lunar phase near new moon
Amavasya corresponds to the period when the Moon is within 12 degrees of angular distance from the Sun before their conjunction. In Hindu culture, Amavasya day
Amavasya
Theorem in geometry
on a spherical Earth of radius 6371 km; the side corresponds to an angular distance of 60/6371=.0094, or approximately 10−2 radians (subtending an angle
Legendre's theorem on spherical triangles
Legendre's_theorem_on_spherical_triangles
Celestial coordinate system in spherical coordinates, with the Sun as its center
the east in the fundamental plane. Longitude (symbol l) measures the angular distance of an object eastward along the galactic equator from the Galactic
Galactic_coordinate_system
Mechanisms for smoothly transmitting rotation through a bend in a drive shaft
movement of the driven shaft will cause the balls to move one half of the angular distance. For example, when the driven shaft moves through an angle of 20 degrees
Constant-velocity_joint
Greek librarian, mathematician, geographer, and poet
Eratosthenes improved the accuracy of the measurement. He determined the angular distance between the two tropics as of the full circle (360°), i.e., 47° 42′
Eratosthenes
Spherical triangle used in astronavigation
star. The position of Z or X is described via its declination—the angular distance north or south of the equator (corresponding to its latitude)—and the
Navigational_triangle
Optical phenomenon in water
make the aureole effect more pronounced. The effect extends a greater angular distance from the viewer's shadow when the viewer is higher above the water
Aureole_effect
Exoplanet orbiting 82 G. Eridani
poorly known, it could harbour life. This planet is notable for its short distance from Earth, 19.7 ly (6.0 pc), which makes it one of the nearest exoplanets
HD_20794_d
Physical point in a raster image
resolution of the monitor. The pixel scale used in astronomy is the angular distance between two objects on the sky that fall one pixel apart on the detector
Pixel
Brightest star in the constellation Leo
observed as it is much fainter than the primary. The BC pair lies at an angular distance of 177 arc-seconds from Regulus A, making them visible in amateur telescopes
Regulus
Star in the constellation Virgo
Big Dipper (or Plough) to Arcturus, and then continue on the same angular distance to Spica. This can be recalled by the mnemonic phrase, "arc to Arcturus
Spica
Objects that appear to be close in the sky
earth close to Sirius. At this occasion Pallas had not only the lowest angular distance to Sirius in the 21st century, but also since its discovery in 1802
Conjunction_(astronomy)
Beginnings in Hellenistic astrology
Venus is at 60° from the Sun and Mercury at 30°, while in reality the angular distance for Venus is never more than 47.8° and for Mercury it is less than
Thema_Mundi
Early 6th-century Chinese mathematician
the formula for the volume of a sphere. He additionally measured the angular distance between Polaris and the celestial north pole, which was greater 1600
Zu_Gengzhi
Measuring instrument in Astronomy
that it could be used at any orientation. This allows the measure of angular distances between astronomical bodies.[citation needed] These instruments differ
Sextant_(astronomy)
Eye movement
resulting in a pulse-step control. The amplitude of a saccade is the angular distance the eye travels during the movement. For amplitudes up to 15 or 20°
Saccade
Region of space gravitationally dominated by a given body
of influence is, in fact, not quite a sphere. The distance to the SOI depends on the angular distance θ {\displaystyle \theta } from the massive body.
Sphere of influence (astrodynamics)
Sphere_of_influence_(astrodynamics)
Second planet from the Sun
observations of its crescent. When Venus is sufficiently bright with enough angular distance from the sun, it is easily observed in a clear daytime sky with the
Venus
Spatial frequency of a wave
frequency. In theoretical physics, an angular wave number, defined as the number of radians per unit distance is more often used: k = 2 π λ = 2 π ν ~
Wavenumber
Navigation instrument
the instrument. Large frame-based instruments used for measuring angular distances between astronomical objects. Geometric quadrant used by surveyors
Quadrant_(instrument)
Tools used by navigators and pilots
which used a plumb bob. These instruments are also used to measure the angular distance between objects: Octant, invented in 1731. The first widely accepted
Navigational_instrument
Symbols for constants, special functions
equinox along the zodiacal circle, and celestial latitude (β) is the angular distance of the arc dropped perpendicularly from the body to the zodiacal circle
Greek letters used in mathematics, science, and engineering
Greek_letters_used_in_mathematics,_science,_and_engineering
Triple star system in the constellation Pictor
"VizieR Online Data Catalog: StarHorse2, Gaia EDR3 photo-astrometric distances (Anders+, 2022)". Vizier Online Data Catalog. Bibcode:2022yCat.1354..
EBLM_J0555−57
Triple star system in the constellation Pegasus
components, designated Kappa Pegasi A and B, that are separated by an angular distance of 0.235 arcseconds. The binary nature of this pair was discovered
Kappa_Pegasi
ANGULAR DISTANCE
ANGULAR DISTANCE
Girl/Female
Assamese, Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Sanskrit, Sindhi, Tamil, Telugu
Not Wild; Gentle
Girl/Female
Muslim
Unique, Singular, Exclusive
Girl/Female
Arabic, Muslim
Unique; Singular
Boy/Male
Hindu, Indian, Kannada, Tamil
Witty; Super
Girl/Female
Afghan, American, British, Christian, English, Finnish, French, Greek, Indian, Irish, Lebanese, Polish, Portuguese, Romanian, Spanish, Swedish, Tamil
Heavenly Messenger; Angel; Messenger from God
Boy/Male
Hindu, Indian, Tamil
Regular Winner
Girl/Female
Indian, Tamil
Lovely; Kind-hearted
Boy/Male
Arabic, Hindu, Indian, Muslim
Shining
Boy/Male
Gujarati, Hindu, Indian, Kannada
Spark of Fire
Girl/Female
Muslim
Unique, Singular
Girl/Female
American, Australian, British, English
Beautiful Goddess
Girl/Female
Christian & English(British/American/Australian)
Angelic
Boy/Male
Indian, Sanskrit
Praising; A Hymn
Girl/Female
Indian
Unique, Singular
Girl/Female
Muslim
Unique, Singular, Exclusive
Girl/Female
French Spanish American Italian Latin Greek
Angel.
Boy/Male
Indian, Sanskrit
Radiant; Bright; Enlightening
Boy/Male
Arabic, Muslim, Parsi, Pashtun
Embers
Female
English
Feminine form of Latin Angelus, ANGELA means "angel, messenger."
Girl/Female
Muslim
Unique, Singular, Exclusive
ANGULAR DISTANCE
ANGULAR DISTANCE
Boy/Male
Tamil
Rain
Boy/Male
American, Anglo, British, English
From the Hare's Valley
Boy/Male
Indian, Punjabi, Sikh
Radiating the Light of Peace
Surname or Lastname
English and Scottish
English and Scottish : variant spelling of Sherron.
Boy/Male
Indian, Sanskrit
Beauty; Splendor; Appearance; Tenderness
Girl/Female
German, Hebrew, Irish
Flock of Sheep
Boy/Male
British, English
Welsh Friend
Boy/Male
Hindu, Indian, Marathi
Endowed with Virtue
Boy/Male
Indian, Punjabi, Sikh
Grace
Boy/Male
Hebrew
God's helper.
ANGULAR DISTANCE
ANGULAR DISTANCE
ANGULAR DISTANCE
ANGULAR DISTANCE
ANGULAR DISTANCE
v. t.
To make angular.
pl.
of Ungula
a.
Measured by an angle; as, angular distance.
a.
Having all the parts of the same kind alike in size and shape; as, a regular flower; a regular sea urchin.
a.
Standing by itself; out of the ordinary course; unusual; uncommon; strange; as, a singular phenomenon.
n.
The singular number, or the number denoting one person or thing; a word in the singular number.
a.
Not angular.
a.
Having the form of a ring; annular.
a.
Pertaining to, or having the form of, a ring; forming a ring; ringed; ring-shaped; as, annular fibers.
a.
Each; individual; as, to convey several parcels of land, all and singular.
a.
Thorough; complete; unmitigated; as, a regular humbug.
adv.
In an angular manner; with of at angles or corners.
a.
Conformed to a rule; agreeable to an established rule, law, principle, or type, or to established customary forms; normal; symmetrical; as, a regular verse in poetry; a regular piece of music; a regular verb; regular practice of law or medicine; a regular building.
a.
Relating to an angle or to angles; having an angle or angles; forming an angle or corner; sharp-cornered; pointed; as, an angular figure.
a.
Fig.: Lean; lank; raw-boned; ungraceful; sharp and stiff in character; as, remarkably angular in his habits and appearance; an angular female.
a.
Of or pertaining to the throat or neck; as, the jugular vein.
adv.
In an angular manner; angularly.
a.
Of or pertaining to the jugular vein; as, the jugular foramen.
a.
Constituted, selected, or conducted in conformity with established usages, rules, or discipline; duly authorized; permanently organized; as, a regular meeting; a regular physican; a regular nomination; regular troops.
a.
Denoting one person or thing; as, the singular number; -- opposed to dual and plural.