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The Lapis Niger (Latin, "Black Stone") is an ancient shrine in the Roman Forum. Together with the associated Vulcanal (a sanctuary to Vulcan ) it constitutes the only surviving remnants of the old Comitium , an early assembly area that preceded the Forum and is thought to derive from an archaic cult site of the 7th or 8th century BC.
A black hole with the mass of a car would have a diameter of about 10 −24 m and take a nanosecond to evaporate, during which time it would briefly have a luminosity of more than 200 times that of the Sun. Lower-mass black holes are expected to evaporate even faster; for example, a black hole of mass 1 TeV/c 2 would take less than 10 −88 ...
People described with words meaning "black", or as Aethiopes, are occasionally mentioned throughout the Empire in surviving writings, and people with very dark skin tones and tightly-curled hair are depicted in various artistic modes. Other words for people with other skin tones were also used. [citation needed]
2019 – The Event Horizon Telescope Collaboration publishes the image of the black hole at the center of the M87 Galaxy. [114] This is the first time astronomers have ever captured an image of a black hole , which once again proves the existence of black holes and thus helps verify Einstein 's general theory of relativity . [ 115 ]
Concrete used in construction in Ancient Rome; irregular pieces of stone, terracotta or brick used to bind the mortar of concrete. Also called caementum (plural caementa). Opus incertum Ancient Roman construction technique, using irregularly shaped and randomly placed uncut stones or fist-sized tuff blocks inserted in a core of opus caementicium.
OJ 287 core black holes — a BL Lac object with a candidate binary supermassive black hole core system [23] PG 1302-102 – the first binary-cored quasar — a pair of supermassive black holes at the core of this quasar [24] [25] SDSS J120136.02+300305.5 core black holes — a pair of supermassive black holes at the centre of this galaxy [26]
Words from an ancient philosopher Over 1,000 carbonized scrolls were recovered from the eruption of Vesuvius, a volcano near Naples, Italy, that covered the ancient Roman cities of Pompeii and ...
The Ancient Romans had two words for black: ater was a flat, dull black, while niger was a brilliant, saturated black. Ater has vanished from the vocabulary, but niger was the source of the country name Nigeria, [ 12 ] the English word Negro , and the word for "black" in most modern Romance languages ( French : noir ; Spanish and Portuguese ...