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The first list shows a few of the known stars with an estimated luminosity of 1 million L ☉ or greater, including the stars in open cluster, OB association and H II region. The majority of stars thought to be more than 1 million L ☉ are shown, but the list is incomplete. The second list gives some notable stars for the purpose of comparison.
The star was initially intended to be lit only during Christmas seasons, but was popular enough with the citizens of Roanoke that it is illuminated every night year-round. It stands 88.5 feet (27.0 m) tall and weighs 60,000 pounds (27,000 kg), rests 846 feet (258 m) above the city of Roanoke, and is visible for 60 miles (97 km) from the air.
The simplest commonly used model of stellar structure is the spherically symmetric quasi-static model, which assumes that a star is in a steady state and that it is spherically symmetric. It contains four basic first-order differential equations : two represent how matter and pressure vary with radius; two represent how temperature and ...
The mural at the Rijksmuseum in Amsterdam is a contemporary example of a star-painted ceiling. The installation was painted in 2013 and consists of 47,000 painted black stars on a plain white ceiling. The six-pointed stars were hand-painted by Richard Wright and his art team over a period of two months. [25]
A celestial map by the Dutch cartographer Frederik de Wit, 1670. A star chart is a celestial map of the night sky with astronomical objects laid out on a grid system. They are used to identify and locate constellations, stars, nebulae, galaxies, and planets. [1]
Stars may also pulsate in a harmonic or overtone which is a higher frequency, corresponding to a shorter period. Pulsating variable stars sometimes have a single well-defined period, but often they pulsate simultaneously with multiple frequencies and complex analysis is required to determine the separate interfering periods.
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