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Giant stars have radii up to a few hundred times the Sun and luminosities over 10 times that of the Sun. Stars still more luminous than giants are referred to as supergiants and hypergiants. A hot, luminous main-sequence star may also be referred to as a giant, but any main-sequence star is properly called a dwarf, regardless of how large and ...
In August 2020, the U.S. Food and Drug Administration (FDA) became aware of nitrosamine impurities in certain samples of rifampin. [62] The FDA and manufacturers are investigating the origin of these impurities in rifampin, and the agency is developing testing methods for regulators and industry to detect the 1-methyl-4-nitrosopiperazine (MNP ...
The most luminous known asymptotic giant branch star. [20] Widely recognised as being among the largest known stars. [21] NML Cygni < 1,350 +195 −229 [c] AD Surrounding dusty region is very complex making the radius hard to determine. [22] Stephenson 2 DFK 2 1,300 ± 300 [12] L/T eff: Another red supergiant, Stephenson 2 DFK 1 has an ...
This is a list of the nearest giant stars (luminosity class III or II) to the Earth, located at a distance of up to 100 light-years ... 15.19 ± 0.10 [51] 1.5 ...
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It contains genes rifG through rifN, which were shown to biosynthesize AHBA.[10] RifK, rifL, rifM, and rifN are believed to act as transaminases in order to form the AHBA precursor kanosamine. [13] [14] "RifH" encodes aminoDAHP synthase that catalyzes the condensation between 1-deoxy-1-imino-d-erythrose 4-phosphate and phosphoenolpyruvate. [15]
Alpha Lupi (α Lupi, α Lup), also named Uridim, [11] is a blue giant star, and the brightest star in the southern constellation of Lupus.According to the Bortle Dark-Sky Scale, its apparent visual magnitude of 2.3 [2] makes it readily visible to the naked eye even from highly light-polluted locales.
This is a list of the nearest supergiant stars to Earth, located at a distance of up to 1,100 light-years (340 parsecs) from Earth. Some of the brightest stars in the night sky, such as Rigel and Antares, are in the list.