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HE 1523-0901 is the designation given to a red giant star in the Milky Way galaxy approximately 9,900 light-years from Earth. It is thought to be a second generation, Population II, or metal-poor, star ([Fe/H] = −2.95). The star was found in the sample of bright metal-poor halo stars from the Hamburg/ESO Survey by Anna Frebel and
Register of the Kentucky Historical Society (2012) 110#1, pp. 33–66. excerpt; Baldwin, Yvonne Honeycutt. Cora Wilson Stewart and Kentucky's Moonlight Schools: Fighting for Literacy in America (University Press of Kentucky, 2006) Birdwhistell, Terry L. "Divided We Fall: State College and the Normal School Movement in Kentucky, 1880–1910."
All-sky map of the CMB, created from nine years of WMAP data. c. 370,000 years (z=1,100): The "Dark Ages" is the period between decoupling, when the universe first becomes transparent, until the formation of the first stars. Recombination: electrons combine with nuclei to form atoms, mostly hydrogen and helium. At this time, hydrogen and helium ...
Zooming in on a portion of the Euclid telescope's map 600 times reveals the galaxies within the cluster Abell 3381, located 470 million light-years away from Earth.
Cosmos Redshift 7 (also known as COSMOS Redshift 7, Galaxy Cosmos Redshift 7, Galaxy CR7 or CR7) is a high-redshift Lyman-alpha emitter galaxy.At a redshift z = 6.6, [1] the galaxy is observed as it was about 800 million years after the Big Bang, during the epoch of reionisation. [1]
In reality, many population I stars are also found mixed in with the older population II stars. In 1944 , Walter Baade categorized groups of stars within the Milky Way into stellar populations . In the abstract of the article by Baade, he recognizes that Jan Oort originally conceived this type of classification in 1926 .
The applicant said there are over 7,700 charter schools across 45 states, ”yet Kentucky represents none of these, even though every state bordering Kentucky has charter schools.“
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 ...