Star that never sets due to its apparent proximity to a celestial pole
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Circumpolar star trails in a long-exposure photo of several hours. The stars near the celestial pole leave shorter trails with the long exposure.
A circumpolar star is a star that, as viewed from a given latitude on Earth, never sets below the horizon due to its apparent proximity to one of the celestial poles. Circumpolar stars are therefore visible from said location toward the nearest pole for the entire night on every night of the year (and would be continuously visible throughout the day too, were they not overwhelmed by the Sun's glare). Others are called seasonal stars.
All circumpolar stars lie within a circumpolar circle whose size is determined by the observer's latitude. Specifically, the angular measure of the radius of this circle equals the observer's latitude. The closer the observer is to the North or South Pole, the larger its circumpolar circle.
Before the definition of the Arctic was formalized as the region north of the Arctic Circle which experiences the Midnight sun, it more broadly meant those places where the 'bear' constellations (Ursa Major, the Great Bear, and Ursa Minor, the Little Bear) were high in the sky. Thus the word 'Arctic' is derived from the Greek ἀρκτικός (arktikos), 'bearish', from ἄρκτος (arktos), 'bear'.
A circumpolarstar is a star that, as viewed from a given latitude on Earth, never sets below the horizon due to its apparent proximity to one of the celestial...
Look up circumpolar in Wiktionary, the free dictionary. Circumpolar may refer to: Antarctic region Antarctic Circle the Antarctic Circumpolar Current...
north Antarctic Circle Arctic cooperation and politics Arctic haze Circumpolarstar Equator Scott Polar Research Institute Territorial claims in the Arctic...
Petersburg). Because of its declination of roughly −17°, Sirius is a circumpolarstar from latitudes south of 73° S. From the Southern Hemisphere in early...
Polaris is a star in the northern circumpolar constellation of Ursa Minor. It is designated α Ursae Minoris (Latinized to Alpha Ursae Minoris) and is commonly...
A star is a luminous spheroid of plasma held together by self-gravity. The nearest star to Earth is the Sun. Many other stars are visible to the naked...
Sirius and the pole. Celestial sphere Celestial equator Circumpolarstar Orbital pole Polaris Pole star Poles of astronomical bodies Jim Kaler Professor Emeritus...
used as a star clock. The Egyptians called the circumpolarstar "the star that cannot perish" and, although they made no known formal star catalogues...
the north of 51° N, Vega remains continuously above the horizon as a circumpolarstar. Around July 1, Vega reaches midnight culmination when it crosses the...
Persei). Alpha Persei has an apparent visual magnitude of 1.8, and is a circumpolarstar when viewed from mid-northern latitudes. Alpha Persei lies in the midst...
gravitation is generally called a star cluster or galaxy, although, broadly speaking, they are also star systems. Star systems are not to be confused with...
A pole star is a visible star that is approximately aligned with the axis of rotation of an astronomical body; that is, a star whose apparent position...
February 11. When seen from latitudes south of 37° 18′ S, Canopus is a circumpolarstar. Since Canopus is so far south in the sky, it never rises in mid- to...
wood, together may depict the Summer Triangle, which at the time was a circumpolar formation. Rappenglueck also discovered a drawing of the Northern Crown...
An exotic star is a hypothetical compact star composed of exotic matter (something not made of electrons, protons, neutrons, or muons), and balanced against...
A neutron star is the collapsed core of a massive supergiant star. The stars that later collapse into neutron stars have a total mass of between 10 and...
system Earth's Solar System Earth-centric observation of stars Pole starCircumpolarstar Magnitude Apparent magnitude Photographic magnitude color-color...
approval comes mostly from its Working Group on Star Names, which has been publishing a "List of IAU-approved Star Names" since 2016. As of April 2022, the list...
based on their spectral characteristics. Electromagnetic radiation from the star is analyzed by splitting it with a prism or diffraction grating into a spectrum...
Stellar evolution is the process by which a star changes over the course of time. Depending on the mass of the star, its lifetime can range from a few million...
A binary star or binary star system is a system of two stars that are gravitationally bound to and in orbit around each other. Binary stars in the night...
the use of circumpolar stars to navigate by. To navigate along a degree of latitude a sailor would have needed to find a circumpolarstar above that degree...
thus of early type".[dubious – discuss] O-type main-sequence star B-type main-sequence star Stellar kinematics M. Pantaleoni González (2021). "The Alma...
Black hole Stellar black hole Compact star Exotic star Boson star Electroweak star Preon star Strange star Quark star *Miller, J. C.; Shahbaz, T.; Nolan...
A carbon star (C-type star) is typically an asymptotic giant branch star, a luminous red giant, whose atmosphere contains more carbon than oxygen. The...
The Sun is the star at the center of the Solar System. It is a massive, hot ball of plasma, inflated and heated by energy produced by nuclear fusion reactions...
A dwarf star is a star of relatively small size and low luminosity. Most main sequence stars are dwarf stars. The meaning of the word "dwarf" was later...
listed by their total or combined brightness if they appear as a single star to the naked eye, or listed separately if they do not. As with all magnitude...
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