Search results
Results From The WOW.Com Content Network
The equatorial describes the sky as seen from the Solar System, and modern star maps almost exclusively use equatorial coordinates. The equatorial system is the normal coordinate system for most professional and many amateur astronomers having an equatorial mount that follows the movement of the sky during the night.
Star position is the apparent angular position of any given star in the sky, which seems fixed onto an arbitrary sphere centered on Earth. The location is defined by a pair of angular coordinates relative to the celestial equator: right ascension (α) and declination (δ). This pair based the equatorial coordinate system.
Procyon's closest neighboring star is Luyten's Star, about 1.12 light-years (0.34 parsecs) away. [52] Procyon would be the brightest star in the night sky of an exoplanet orbiting Luyten's Star, with an apparent magnitude of -4.68. [a] Luyten's Star would also be visible from Procyon, at an apparent magnitude of 4.61, unlike any red dwarfs from ...
A diagram of a typical nautical sextant, a tool used in celestial navigation to measure the angle between two objects viewed by means of its optical sight. Celestial navigation, also known as astronavigation, is the practice of position fixing using stars and other celestial bodies that enables a navigator to accurately determine their actual current physical position in space or on the ...
A number of different coordinate systems, each differing by a few degrees, were used until 1932, when Lund Observatory assembled a set of conversion tables that defined a standard galactic coordinate system based on a galactic north pole at RA 12 h 40 m, dec +28° (in the B1900.0 epoch convention) and a 0° longitude at the point where the ...
An older English name, attested since the 14th century, is lodestar "guiding star", cognate with the Old Norse leiðarstjarna, Middle High German leitsterne. [ 49 ] The ancient name of the constellation Ursa Minor, Cynosura (from the Greek κυνόσουρα "the dog's tail"), [ 50 ] became associated with the pole star in particular by the ...
In the equatorial coordinate system, the right ascension coordinates of these borders lie between 11 h 56.13 m and 12 h 57.45 m, while the declination coordinates are between −55.68° and −64.70°. [17] Its totality figures at least part of the year south of the 25th parallel north. [18] [b] In tropical regions Crux can be seen in the sky ...
The Hipparchus star catalog is a list of at least 850 stars that also contained coordinates of stellar positions in the sky, based on celestial equatorial latitude and longitude. [1] According to British classicist Thomas Heath , Hipparchus was the first to employ such a method to map the stars, at least in the West. [ 2 ]