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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 ...
Back in 2017, NASA astronauts Peggy Whitson and Jack Fischer live-streamed a broadcast from the International Space Station using 4K ultra-high-definition technology — the next-gen standard for ...
The article also said that the United States Air Force's Space Command was unaware of Blackstar, suggesting it was operated by an intelligence agency such as the National Reconnaissance Office. [1] [2] Aviation Week speculated that such a spacecraft could also have offensive military capabilities, a concept colloquially known as "The Space Bomber".
Black star (semiclassical gravity), a theoretical star built using semiclassical gravity as an alternative to a black hole Saturn , referred to as "Black Star" in ancient Judaeic belief Black dwarf , a theoretical stellar remnant formed after cooling of a white dwarf to a sufficient level where heat is no longer emitted
SMSS J215728.21-360215.1, commonly known as J2157-3602, is one of the fastest growing black holes and one of the most powerful quasars known to exist as of 2021.The quasar is located at redshift 4.75, [1] corresponding to a comoving distance of 2.5 × 10 10 ly from Earth and to a light-travel distance of 1.25 × 10 10 ly.
A map of the Boötes Void. The Boötes Void (/ b oʊ ˈ oʊ t iː z / boh-OH-teez) (colloquially referred to as the Great Nothing) [1] is an approximately spherical region of space found in the vicinity of the constellation Boötes, containing only 60 galaxies instead of the 2,000 that should be expected from an area this large, hence its name.
Photon sphere – spherical region of space where gravity is strong enough that photons are forced to travel in orbits. Ergosphere – region located outside a rotating black hole. Hawking radiation – black-body radiation that is predicted to be emitted by black holes, due to quantum effects near the event horizon. [2]
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.