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The following is a list of particularly notable actual or hypothetical stars that have their own articles in Wikipedia, but are not included in the lists above. BPM 37093 — a diamond star Cygnus X-1 — X-ray source
In 2016, the International Astronomical Union (IAU) organized a Working Group on Star Names (WGSN) [2] to catalog and standardize proper names for stars. The WGSN's first bulletin, dated July 2016, [3] included a table of 125 stars comprising the first two batches of names approved by the WGSN (on 30 June and 20 July 2016) together with names of stars adopted by the IAU Executive Committee ...
Size (left) and distance (right) of a few well-known galaxies put to scale. The following is a list of notable galaxies.. There are about 51 galaxies in the Local Group (see list of nearest galaxies for a complete list), on the order of 100,000 in the Local Supercluster, and an estimated 100 billion in all of the observable universe.
Lists of stars. List of nearest stars; List of brightest stars; List of hottest stars; List of nearest bright stars; List of most luminous stars; List of most massive stars; List of largest known stars; List of smallest stars; List of oldest stars; List of stars with proplyds; List of variable stars; List of semiregular variable stars; List of ...
This number is wrong; originally announced in 1891, the figure was corrected in 1910 to 40 ly (60 mas). From 1891 to 1910, it had been thought this was the star with the smallest known parallax, hence the most distant star whose distance was known. Prior to 1891, Arcturus had previously been recorded of having a parallax of 127 mas.
The star contains starspots on its surface ζ And Aa 2.502 ± 0.008: 15.0 ± 0.8 (polar) 189 ± 3: CFHT [9] [10] 1996: First direct imaging of starspots on a star outside the Solar System. R Dor: 57 ± 5: 370 ± 50: 204 ± 9: New Technology Telescope [11] 1993: 2nd largest known star by apparent diameter in Earth's sky, after the Sun. Mira ο ...
List of largest known stars: Smallest star EBLM J0555-57Ab: 2017 0.084 R ☉ [NB 3] [47] [48] [49] List of smallest stars: Most massive star BAT99-98 or R136a1: 2014, 2022 226 M ☉, 196 +34 −27 M ☉ This exceeds the predicted limit of 150 M ☉, previously believed to be the limit of stellar mass, according to the leading star formation ...
In this collision between two clusters of galaxies, the stars pass between each other unhindered, while the hot, diffuse gas experiences friction and is left behind between the clusters. The gas dominates the visible mass budget of the clusters, being several times more massive than all the stars.