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Neutron stars are stellar remnants produced when a star of around 8–9 solar masses or more explodes in a supernova at the end of its life. They are usually produced by stars of less than 20 solar masses, although a more massive star may produce a neutron star in certain cases. [2] 4U 1820-30: 9.1 Pulsar [3] Lich Pulsar (PSR B1257+12) 10 Pulsar
The Hertzsprung–Russell diagram showing the location of main sequence dwarf stars and white dwarfs. A dwarf star is a star of relatively small size and low luminosity. Most main sequence stars are dwarf stars. The meaning of the word "dwarf" was later extended to some star-sized objects that are not stars, and compact stellar remnants that ...
stress outlined white star U+2729 circled white star U+272A open center black star U+272B black center white star U+272C outlined black star U+272D heavy outlined black star U+272E pinwheel star U+272F shadowed white star U+2730 white medium star ⭐: U+2B50 black small star ⭑ U+2B51 white small star ⭒ U+2B52 glowing star 🌟: U+1F31F ...
Barnard's Star is a small red dwarf star in the constellation of Ophiuchus.At a distance of 5.96 light-years (1.83 pc) from Earth, it is the fourth-nearest-known individual star to the Sun after the three components of the Alpha Centauri system, and is the closest star in the northern celestial hemisphere. [15]
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
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
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They can also be called dead stars in public communications. The state and type of a stellar remnant depends primarily on the mass of the star that it formed from. The ambiguous term compact object is often used when the exact nature of the star is not known, but evidence suggests that it has a very small radius compared to ordinary stars.