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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 ...
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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
A quasi-star (also called black hole star) is a hypothetical type of extremely large and luminous star that may have existed early in the history of the Universe. They are thought to have existed for around 7–10 million years due to their immense mass .
1990 – FIRAS on the Cosmic Background Explorer (COBE) satellite measures the black body form of the CMB spectrum with exquisite precision, and shows that the microwave background has a nearly perfect black-body spectrum with T = 2.73 K and thereby strongly constrains the density of the intergalactic medium.
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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.