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She also used types such as B5A for stars halfway between types B and A, F2G for stars one fifth of the way from F to G, and so on. [60] [61] Finally, by 1912, Cannon had changed the types B, A, B5A, F2G, etc. to B0, A0, B5, F2, etc. [62] [63] This is essentially the modern form of the Harvard classification system. This system was developed ...
A yellow hypergiant, one of the rarest types of stars. V838 Monocerotis: 464 [79] L/T eff: During the 2002 Red Nova, the star's radius may have increased up to 3,190 R ☉. [80] Pistol Star (V4647 Sagittarii) 420 [81] L/T eff: One of the most luminous stars known. La Superba (Y Canum Venaticorum) 344 [82] L/T eff: Mira (ο Ceti A) 332–402 [83] AD
Omega Centauri, one of the largest star clusters. Below is a list of the largest known star clusters, ordered by diameter in light years, above the size of 50 light years in diameter. This list includes globular clusters, open clusters, super star clusters, and other types.
Pages in category "Star types" The following 88 pages are in this category, out of 88 total. This list may not reflect recent changes. A. A-type main-sequence star;
List of star systems within 70–75 light-years; List of star systems within 75–80 light-years; List of star systems within 80–85 light-years; List of star systems within 85–90 light-years; List of star systems within 90–95 light-years; List of star systems within 95–100 light-years; List of nearest stars by spectral type; List of ...
Other than the Sun, the star with the largest apparent size is R Doradus, with an angular diameter of only 0.057 arcseconds. [138] The disks of most stars are much too small in angular size to be observed with current ground-based optical telescopes, so interferometer telescopes are required to
Astronomers have long hypothesized that as a protostar grows to a size beyond 120 M ☉, something drastic must happen. [2] Although the limit can be stretched for very early Population III stars, and although the exact value is uncertain, if any stars still exist above 150–200 M ☉ they would challenge current theories of stellar evolution.
Below there are lists the nearest stars separated by spectral type. The scope of the list is still restricted to the main sequence spectral types: M, K, F, G, A, B and O. It may be later expanded to other types, such as S, D or C. The Alpha Centauri star system is the closest star system to the Sun.