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The preserve was created in 1979 when the land was given to the Office of Kentucky Nature Preserves by Judge Macauley and Mrs. Emilie Smith creating the first nature preserve in the Commonwealth's system. The Blackacre Conservancy, founded in 1983, operates the historic homestead and conducts cultural and historical programs while the Office ...
Wickliffe Mounds is a prehistoric, Mississippian culture archaeological site located in Ballard County, Kentucky, just outside the town of Wickliffe, about 3 miles (4.8 km) from the confluence of the Ohio and Mississippi rivers.
The first generation of stars, known as Population III stars, formed within a few hundred million years after the Big Bang. [62] These stars were the first source of visible light in the universe after recombination. Structures may have begun to emerge from around 150 million years, and early galaxies emerged from around 180 to 700 million years.
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In 2007, a team of astronomers led by Giampaolo Piotto of the University of Padua in Italy investigated Hubble Space Telescope images of NGC 2808 taken in 2005 and 2006 with Hubble's Advanced Camera for Surveys. Unexpectedly, they found that this cluster is composed of three generations of stars, all born within 200 million years of the ...
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.
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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