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The following is a list of stars with resolved images, that is, stars whose images have been resolved beyond a point source. Aside from the Sun , observed from Earth , stars are exceedingly small in apparent size, requiring the use of special high-resolution equipment and techniques to image.
The star has no definable "edge" as limb darkening causes the optical emissions to vary in color and decrease the farther one extends out from the center; Betelgeuse is surrounded by a circumstellar envelope composed of matter ejected from the star—matter which absorbs and emits light—making it difficult to define the photosphere of the ...
A red giant star with one of the largest ranges in brightness known of stars in the night sky visible to the unaided eye. Despite its large radius, it is less massive than the Sun. 119 Tauri (CE Tauri, Ruby Star) 587 – 593 [72] AD ρ Cassiopeiae: 564 ± 67 – 700 ± 112 [73] AD
The Large Sagittarius Star Cloud appears to be steam emerging from the "spout".) Northeast of the Teapot asterism lies the fainter Teaspoon, consisting of the stars ξ¹, ξ², ο, π, ρ¹ and ρ² Sagitarii. [16] Four bright stars in Delphinus (Sualocin or α Delphini, Rotanev or β Delphini, γ Delphini and δ Delphini) form Job's Coffin. [5]
A giant star has a substantially larger radius and luminosity than a main-sequence (or dwarf) star of the same surface temperature. [1] They lie above the main sequence (luminosity class V in the Yerkes spectral classification) on the Hertzsprung–Russell diagram and correspond to luminosity classes II and III. [2]
Stars of greater mass have a higher rate of core energy generation, and heavier stars' luminosities increase far out of proportion to the increase in their masses. The Eddington limit is the point beyond which a star ought to push itself apart, or at least shed enough mass to reduce its internal energy generation to a lower, maintainable rate.
The Guide Star Catalog is an online catalogue of stars produced for the purpose of accurately positioning and identifying stars satisfactory for use as guide stars by the Hubble Space Telescope program. The first version of the catalogue was produced in the late 1980s by digitizing photographic plates and contained about 20 million stars, out ...
Star polygon, a star drawn with a number of lines equal to the number of points Pentagram, a five-pointed star polygon Five-pointed star, a pentagram with internal line segments removed; Lute of Pythagoras, a pentagram-based fractal pattern; Hexagram, a six-pointed star polygon; Heptagram, a seven-pointed star polygon