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Mira A is an old star, already shedding its outer layers into space. The evolutionary path the star takes as it moves along the red-giant branch depends on the mass of the star. For the Sun and stars of less than about 2 M ☉ [13] the core will become dense enough that electron degeneracy pressure will prevent it from collapsing further.
The letter "M" in this designation means that it is a red star belonging to the M spectral class and therefore has a relatively low photospheric temperature; the "Ia-ab" suffix luminosity class indicates that it is an intermediate-luminosity supergiant, with properties partway between a normal supergiant and a luminous supergiant. Since 1943 ...
UY Scuti (BD-12°5055) is a red supergiant star, located 5,900 light-years away in the constellation Scutum.It is also a pulsating variable star, with a maximum brightness of magnitude 8.29 and a minimum of magnitude 10.56, which is too dim for naked-eye visibility.
Some red supergiants undergo blue loops where they temporarily increase in temperature before returning to the red supergiant state. This depends on the mass, rate of rotation, and chemical makeup of the star. While many red supergiants will not experience a blue loop, some can have several. Temperatures can reach 10,000K at the peak of the ...
Although red supergiants are often considered the largest stars, some other star types have been found to temporarily increase significantly in radius, such as during LBV eruptions or luminous red novae. Luminous red novae appear to expand extremely rapidly, reaching thousands to tens of thousands of solar radii within only a few months ...
Orange to red stars with complex band spectra, such as Betelgeuse and Antares. This corresponds to the modern class M. Secchi class IV: In 1868, he discovered carbon stars, which he put into a distinct group: [48] Red stars with significant carbon bands and lines, corresponding to modern classes C and S. Secchi class V
Mira (/ ˈ m aɪ r ə /), designation Omicron Ceti (ο Ceti, abbreviated Omicron Cet, ο Cet), is a red-giant star estimated to be 200–300 light-years from the Sun in the constellation Cetus. ο Ceti is a binary stellar system, consisting of a variable red giant (Mira A) along with a white dwarf companion .
Star Distance ly Notes 1 Proxima Centauri: 4.2 ly (1.3 pc) Part of the α Cen trinary system, the closest neighbouring star system. It is also the nearest neighbouring star. [9] 2 Barnard's Star: 5.95 ly (1.82 pc) Second closest neighbouring star system [16] 3 Wolf 359: 7.86 ly (2.41 pc) Also called CN Leonis: 4 Lalande 21185: 8.3 ly (2.5 pc) 5