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49 relations: Achernar, Alpha Centauri, Alpha Cephei, Alpha Crucis, Alpha Pavonis, Altitude, Astronomical nutation, Axial precession, Axial tilt, Beta Centauri, Big Dipper, Canopus, Celestial equator, Celestial sphere, Circumpolar star, Constellation, Crux, Declination, Dwarf galaxy, Earth, Equatorial coordinate system, Equilateral triangle, Gamma Cephei, Gamma Crucis, Large Magellanic Cloud, Latin, Latitude, Magellanic Clouds, Milky Way, Musca, North Pole, Octans, Orbital plane (astronomy), Orbital pole, Parallax, Polar motion, Polaris, Pole star, Proper motion, Rotation around a fixed axis, Sidereal time, Sigma Octantis, Sirius, Small Magellanic Cloud, South Pole, Southern celestial hemisphere, Southern Hemisphere, Ursa Minor, Vega.
Achernar
Achernar is the name of the primary (or 'A') component of the binary system designated Alpha Eridani (α Eridani, abbreviated Alf Eri, α Eri), which is the brightest 'star' or point of light in, and lying at the southern tip of, the constellation of Eridanus, and the tenth-brightest in the night sky.
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Alpha Centauri
Alpha Centauri (α Centauri, abbreviated Alf Cen or α Cen) is the star system closest to the Solar System, being from the Sun.
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Alpha Cephei
Alpha Cephei (α Cephei, abbreviated Alpha Cep, α Cep), also named Alderamin, is a second magnitude star in the constellation of Cepheus near the northern pole.
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Alpha Crucis
Alpha Crucis (α Crucis, abbreviated Alpha Cru, α Cru) is a multiple star system located 321 light-years from the Sun in the constellation of Crux and part of the asterism known as the Southern Cross.
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Alpha Pavonis
Alpha Pavonis (α Pavonis, abbreviated Alpha Pav, α Pav), also named Peacock, is a binary star in the southern constellation of Pavo, near the border with the constellation Telescopium.
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Altitude
Altitude or height (sometimes known as depth) is defined based on the context in which it is used (aviation, geometry, geographical survey, sport, atmospheric pressure, and many more).
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Astronomical nutation
Astronomical nutation is a phenomenon which causes the orientation of the axis of rotation of a spinning astronomical object to vary over time.
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Axial precession
In astronomy, axial precession is a gravity-induced, slow, and continuous change in the orientation of an astronomical body's rotational axis.
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Axial tilt
In astronomy, axial tilt, also known as obliquity, is the angle between an object's rotational axis and its orbital axis, or, equivalently, the angle between its equatorial plane and orbital plane.
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Beta Centauri
Beta Centauri (β Centauri, abbreviated Beta Cen, β Cen), also named Agena and Hadar, is a triple star system in the southern constellation of Centaurus.
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Big Dipper
The Big Dipper (US) or the Plough (UK) is an asterism consisting of seven bright stars of the constellation Ursa Major; six of them are of second magnitude and one, Megrez (δ), of third magnitude.
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Canopus
Canopus, also designated Alpha Carinae (α Carinae, abbreviated Alpha Car, α Car), is the brightest star in the southern constellation of Carina, and the second-brightest star in the night-time sky, after Sirius.
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Celestial equator
The celestial equator is the great circle of the imaginary celestial sphere on the same plane as the equator of Earth.
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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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Circumpolar star
A circumpolar star is a star, as viewed from a given latitude on Earth, that never sets below the horizon due to its apparent proximity to one of the celestial poles.
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Constellation
A constellation is a group of stars that are considered to form imaginary outlines or meaningful patterns on the celestial sphere, typically representing animals, mythological people or gods, mythological creatures, or manufactured devices.
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Crux
Crux is a constellation located in the southern sky in a bright portion of the Milky Way.
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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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Dwarf galaxy
A dwarf galaxy is a small galaxy composed of about 100 million up to several billion stars, a small number compared to the Milky Way's 200–400 billion stars.
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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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Equatorial coordinate system
The equatorial coordinate system is a celestial coordinate system widely used to specify the positions of celestial objects.
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Equilateral triangle
In geometry, an equilateral triangle is a triangle in which all three sides are equal.
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Gamma Cephei
Gamma Cephei (γ Cephei, abbreviated Gamma Cep, γ Cep) is a binary star system approximately 45 light-years away in the constellation of Cepheus.
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Gamma Crucis
Gamma Crucis (γ Crucis, abbreviated Gamma Cru, γ Cru), also named Gacrux, is the nearest M-Giant star to the Sun.
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Large Magellanic Cloud
The Large Magellanic Cloud (LMC) is a satellite galaxy of the Milky Way.
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Latin
Latin (Latin: lingua latīna) is a classical language belonging to the Italic branch of the Indo-European languages.
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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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Magellanic Clouds
The Magellanic Clouds (or Nubeculae Magellani) are two irregular dwarf galaxies visible in the Southern Celestial Hemisphere; they are members of the Local Group and are orbiting the Milky Way galaxy.
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Milky Way
The Milky Way is the galaxy that contains our Solar System.
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Musca
Musca is a small constellation in the deep southern sky.
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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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Octans
Octans is a faint constellation located in the deep southern sky.
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Orbital plane (astronomy)
The orbital plane of a revolving body is the geometric plane on which its orbit lies.
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Orbital pole
An orbital pole is either point at the ends of an imaginary line segment that runs through the center of an orbit (of a revolving body like a planet) and is perpendicular to the orbital plane.
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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 semi-angle of inclination between those two lines.
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Polar motion
Polar motion of the Earth is the motion of the Earth's rotational axis relative to its crust.
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Polaris
Polaris, designated Alpha Ursae Minoris (Ursae Minoris, abbreviated Alpha UMi, UMi), commonly the North Star or Pole Star, is the brightest star in the constellation of Ursa Minor.
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Pole star
Pole star or polar star refers to a star, preferably bright, closely aligned to the axis of rotation of an astronomical object.
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Proper motion
Proper motion is the astronomical measure of the observed changes in the apparent places of stars or other celestial objects in the sky, as seen from the center of mass of the Solar System, compared to the abstract background of the more distant stars.
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Rotation around a fixed axis
Rotation around a fixed axis or about a fixed axis of revolution or motion with respect to a fixed axis of rotation is a special case of rotational motion.
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Sidereal time
Sidereal time is a timekeeping system that astronomers use to locate celestial objects.
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Sigma Octantis
Sigma Octantis (σ Octantis, abbreviated Sig Oct, σ Oct), also named Polaris Australis, is the current South Star.
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Sirius
Sirius (a romanization of Greek Σείριος, Seirios,."glowing" or "scorching") is a star system and the brightest star in the Earth's night sky.
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Small Magellanic Cloud
The Small Magellanic Cloud (SMC), or Nubecula Minor, is a dwarf galaxy near the Milky Way.
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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 celestial hemisphere
The Southern Celestial Hemisphere, or the Southern Sky, is the southern half of the celestial sphere, which appears to rotate around a polar axis due to Earth's rotation.
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Southern Hemisphere
The Southern Hemisphere is the half of Earth that is south of the Equator.
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Ursa Minor
Ursa Minor (Latin: "Lesser Bear", contrasting with Ursa Major), also known as the Little Bear, is a constellation in the Northern Sky.
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Vega
Vega, also designated Alpha Lyrae (α Lyrae, abbreviated Alpha Lyr or α Lyr), is the brightest star in the constellation of Lyra, the fifth-brightest star in the night sky, and the second-brightest star in the northern celestial hemisphere, after Arcturus.
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Redirects here:
Celestial Poles, Celestial north pole, Celestial south pole, North Celestial Pole, North celestial pole, Northern Celestial Pole, South Celestial Pole, South celestial pole.
References
[1] https://en.wikipedia.org/wiki/Celestial_pole
