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Ernest Borgnine (/ ˈ b ɔːr ɡ n aɪ n / BORG-nyne; born Ermes Effron Borgnino; January 24, 1917 – July 8, 2012) was an American actor whose career spanned over six decades.He was noted for his gruff but relaxed voice and gap-toothed Cheshire Cat grin. [2]
His best known work is probably a catalog with five lists of stars titled Dwarf M Stars Found Spectrophotometrically. This work was important because it was the first list of nearby stars identified not by their motions in the sky, but by their intrinsic, spectroscopic, characteristics. Emma Vyssotsky: United States: 1894: 1975 Arno Arthur ...
Small dim stars seem to be the most common stars in space, at least locally, but can only be seen with large telescopes, and then only when they are within a few tens of light-years from Earth. For example, the blue supergiant ζ Puppis is 400 million times more luminous than the nearest star, a red dwarf named Proxima , or α Centauri C .
Stability, luminosity, and lifespan are all factors in stellar habitability. Humans know of only one star that hosts life, the G-class Sun, a star with an abundance of heavy elements and low variability in brightness. The Solar System is also unlike many stellar systems in that it only contains one star (see Habitability of binary star systems).
Also known as Suhail and Suhail al Muhlif, which also apply to λ Velorum (Suhail). /ˈriːɡɔːr/ Leo: α Leonis A: Regulus: Latin for 'prince' or 'little king'. Regulus was known to Persian astrologers as "Venant, Watcher of the North", one of the royal stars. /ˈrɛɡjʊləs/ Pisces: ζ Piscium A: Revati /ˈreɪvəti/ Reticulum: α Reticuli ...
The brightest stars, on either scale, have negative magnitude numbers. The variation in brightness (ΔL) between two stars is calculated by subtracting the magnitude number of the brighter star (m b) from the magnitude number of the fainter star (m f), then using the difference as an exponent for the base number 2.512; that is to say:
The IAU definitions of planet and dwarf planet require that a Sun-orbiting astronomical body has undergone the rounding process to reach a roughly spherical shape, an achievement known as hydrostatic equilibrium. The same spheroidal shape can be seen on smaller rocky planets like Mars to gas giants like Jupiter.
The Bright Star Catalogue, which is a star catalogue listing all stars of apparent magnitude 6.5 or brighter, or roughly every star visible to the naked eye from Earth, contains 9,096 stars. [1] The most voluminous modern catalogues list on the order of a billion stars, out of an estimated total of 200 to 400 billion in the Milky Way .