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A black star is created when matter compresses at a rate significantly less than the free fall velocity of a hypothetical particle falling to the center of its star. Quantum processes create vacuum polarization , producing a form of degeneracy pressure preventing spacetime (and the particles held within it) from occupying the same space at the ...
NGC 3324 is an open cluster in the southern constellation Carina, located northwest of the Carina Nebula (NGC 3372) [3] [4] at a distance of 9,100 ly (2,800 pc) from Earth. [2] It is closely associated with the emission nebula IC 2599 , also known as Gum 31 . [ 5 ]
Black Star (cider), a brand of cider produced by Brookfield Drinks; Black Star (fragrance), a perfume by Avril Lavigne; Black Star (photo agency), a New York-based photo agency founded in 1935; Black Star Canyon, an area in Orange County California; Black Star Line, a shipping line created by Marcus Garvey to repatriate African-Americans to Africa
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The conversion of gravitational potential energy to radiation by infalling to a black hole converts between 6% and 32% of the mass to energy, compared to 0.7% for the conversion of mass to energy in a star like the Sun. [40] It is the only process known that can produce such high power over a very long term.
Illustration of the orbits of the sun-like star (blue circle) and the stellar black hole (red circle) in Gaia BH1. The star and black hole orbit each other with a period of 185.59 days and an eccentricity of 0.45. The star is similar to the Sun, with about 0.93 M ☉ and 0.99 R ☉, and a temperature of about 5,850 K (5,580 °C; 10,070 °F ...
The list specifically excludes both white dwarfs – former stars that are now seen to be "dead" but radiating residual heat – and black holes – fragmentary remains of exploded stars which have gravitationally collapsed, even though accretion disks surrounding those black holes might generate heat or light exterior to the star's remains ...
An astrophysical background is produced by the combined noise of many weak, independent, and unresolved astrophysical sources. [2] For instance, the astrophysical background from stellar mass binary black-hole mergers is expected to be a key source of the stochastic background for the current generation of ground based gravitational-wave detectors.