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Instead of the general notion that a void is a region of space with a low cosmic mean density; a hole in the distribution of galaxies, it defines voids to be regions in which matter is escaping; which corresponds to the dark energy equation of state, w. Void centers are then considered to be the maximal source of the displacement field denoted ...
Local concentrations of matter have condensed into stars and galaxies. Intergalactic space takes up most of the volume of the universe, but even galaxies and star systems consist almost entirely of empty space. Most of the remaining mass-energy in the observable universe is made up of an unknown form, dubbed dark matter and dark energy. [5] [6 ...
The word vacuum comes from Latin 'an empty space, void', noun use of neuter of vacuus, meaning "empty", related to vacare, meaning "to be empty".. Vacuum is one of the few words in the English language that contains two consecutive instances of the vowel u.
major void SRSS1 Void 3 (Sculptor Void) 6 3 h 56 m −20° 11′ 56.5 32.0 Eridanus: major void: 7 3 h 17 m −11° 40′ 77.2 25.5 Eridanus: major void: 8 23 h 20 m −12° 32′ 83.9 27.8 Aquarius: major void: 9 3 h 06 m −13° 47′ 114.6 39.0 Eridanus: major void: 10 0 h 26 m −9° 17′ 104.7 34.8 Cetus: major void: 11 0 h 21 m −29 ...
The word dinosaur is commonly used to refer only to non-avian dinosaurs, reflecting an outdated conception of the ancestry of avian dinosaurs, the birds. The evolutionary origin of birds was an open question in paleontology for over a century, but the modern scientific consensus is that birds evolved from small feathered theropods in the Jurassic.
An image of Barnard 68, a dark nebula mistakenly used to refer to the Boötes Void.. The Boötes Void has been often associated with images of Barnard 68, [7] a dark nebula that does not allow light to pass through; however, the images of Barnard 68 are much darker than those observed of the Boötes Void, as the nebula is much closer and there are fewer stars in front of it, as well as its ...
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A vacuum can be viewed not as empty space but as the combination of all zero-point fields. In quantum field theory this combination of fields is called the vacuum state, its associated zero-point energy is called the vacuum energy and the average energy value is called the vacuum expectation value (VEV) also called its condensate.