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This means that SDSS J0018−0939 most likely preserved the elemental abundance ratios produced by a first-generation very-massive star. [7] First generation stars are expected to self-regulate their growth by radiative feedback in the formation process, and to achieve masses typically tens of times that of the Sun. A fraction of stars might ...
Throughout the 1970s and 1980s, Kentucky led the US in coal production. A well drilled in 1819 in salt water, in the South Fork of the Cumberland River revealed the first indications of petroleum in Kentucky. A rush to produce paraffin from oil in the 1850s prompted discoveries in Clinton, Cumberland, Allen, Barren, Meade, Wayne and Russell ...
The Middle and Late Ordovician deposits in Kentucky are exceptionally rich in bryozoans, [52] but bryozoans can be found in Kentucky rocks all the way into the Pennsylvanian period. They may be Kentucky's most common type of fossil. [53] Archimedes, a distinctive genus of Mississippian fenestrate bryozoan known for its screw-like skeletal structure
Fire glass (also fire pit glass, fire rocks, fire beads or lava glass) is a type of tempered glass, chunks of which are used decoratively on fireplaces. Pieces of the glass are heaped around jets of burning gas, or around liquid ethanol , in order to conceal the jets and reflect the flames. [ 1 ]
A state historical marker on the river attributes the markings to the Cherokee Chief Red Bird, for whom the river was named. In the book Rock Art of Kentucky the authors write that "No mention of Chief Red Bird could be found in several early Kentucky histories published in the nineteenth century. Therefore we contacted the Kentucky Historical ...
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By definition, each population group shows the trend where lower metal content indicates higher age of stars. Hence, the first stars in the universe (very low metal content) were deemed population III, old stars (low metallicity) as population II, and recent stars (high metallicity) as population I. [6] The Sun is considered population I, a ...
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