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The distance between the two stars is at least 3,750 AU (0.06 light-year, or almost a hundred times the average distance between Pluto and the Sun), so their orbital period is 170,000 years or more. [16] Both stars share similar physical characteristics to the Sun, [14] so they are considered solar analogs.
This number is wrong; originally announced in 1891, the figure was corrected in 1910 to 40 ly (60 mas). From 1891 to 1910, it had been thought this was the star with the smallest known parallax, hence the most distant star whose distance was known. Prior to 1891, Arcturus had previously been recorded of having a parallax of 127 mas.
An eclipsing binary star is a binary star system in which the orbital plane of the two stars lies so nearly in the line of sight of the observer that the components undergo mutual eclipses. [20] In the case where the binary is also a spectroscopic binary and the parallax of the system is known, the binary is quite valuable for stellar analysis.
The cosmic distance ladder (also known as the extragalactic distance scale) is the succession of methods by which astronomers determine the distances to celestial objects. A direct distance measurement of an astronomical object is possible only for those objects that are "close enough" (within about a thousand parsecs or 3e16 km) to Earth. The ...
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2.38 [4] 5,780 2022 The most luminous known star. Quyllur: 2.1878 [5] 5,540 2023 First red supergiant at cosmological distances. Mothra: 2.091 [6] 5,400 2023 A binary consisting of a yellow supergiant or yellow hypergiant and a Blue supergiant. MACS J1149 Lensed Star 1: 1.49 [7] 4,410 2018 The most distant known star prior to the discovery of ...
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Distance measures are used in physical cosmology to give a natural notion of the distance between two objects or events in the universe.They are often used to tie some observable quantity (such as the luminosity of a distant quasar, the redshift of a distant galaxy, or the angular size of the acoustic peaks in the cosmic microwave background (CMB) power spectrum) to another quantity that is ...