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Oireachtas Rince na Cruinne is the top competition of the hierarchical system operated by An Coimisiún, and dancers must qualify at major Irish stepdance events across the world in order to compete. The first Oireachtas Rince na Cruinne was run in 1970, and the event is now one of six oireachtais (championship competitions) under different ...
The primary star system, AR Cassiopeiae, is a triple. AR Cassiopeiae B is located 0.800″ away from AR Cassiopeiae A. [9] In 1921, Joel Stebbins announced that observations from 1917 through 1921 had shown that the star is an eclipsing binary. [14]
The star system has a relatively high proper motion of 2.9 arc seconds per year, [13] and is moving away from the Solar System at a velocity of 11.6 km/s. [6] It achieved perihelion some 15,000 years ago when it came within 11 ly (3.5 pc) of the Sun. [ 13 ]
This category contains articles about star systems, which are groups of two or more gravitationally-bound stars in a region usually smaller than one light-year. Star clusters (groups of many more stars that occupy a much larger region) are listed in Category:Star clusters.
A multiple star system consists of two or more stars that appear from Earth to be close to one another in the sky. [dubious – discuss] This may result from the stars actually being physically close and gravitationally bound to each other, in which case it is a physical multiple star, or this closeness may be merely apparent, in which case it is an optical multiple star [a] Physical multiple ...
Nu 1 Sagittarii (ν 1 Sagittarii, abbreviated Nu 1 Sgr, ν 1 Sgr) is a triple star system [7] about 1,100 light-years from Earth.Its three components are designated Nu 1 Sagittarii A (officially named Ainalrami / ɛ n əl ˈ r eɪ m i /, the traditional name for the system), [8] B and C. [9] A and B themselves form a spectroscopic binary. [7]
Mar. 8—Four Tri-State dance schools are coming together on Saturday to host a day-long dance competition at Ironton High School. Yvonne Sinnott, owner of the Yvonne DeKay School of Dance, in ...
V1054 Ophiuchi/Gliese 643 has the largest number of stars of all star systems located within 10 pc from Earth. [4] It is also the nearest quintuple star system [3] (the next nearest star systems with at least five stars are GJ 2069 (quintuple) [4] at 41.8 light-years, and Castor [3] (sextuple) at 51.6 light-years), and the only quintuple star system within 10 pc.