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16 hours ago · History The idea of a body so big that even light could not escape was briefly proposed by English astronomical pioneer and clergyman John Michell in a letter published in November 1784. Michell's simplistic calculations assumed such a body might have the same density as the Sun, and concluded that one would form when a star's diameter exceeds the Sun's by a factor of 500, and its surface ...
- Simple English
The supermassive black hole inside the core of the...
- Talk
Black hole is a former featured article.Please see the links...
- List of Black Holes
1ES 2344+514; Ton 618 (this quasar has possibly the biggest...
- Spacetime
In physics, spacetime is a mathematical model that fuses the...
- Update
We would like to show you a description here but the site...
- Event Horizon
The reachable Universe as a function of time and distance,...
- Black Body
A black body radiator used in CARLO laboratory in Poland. It...
- Messier 87
Messier 87 (also known as Virgo A or NGC 4486, generally...
- Cygnus X-1
Cygnus X-1 (abbreviated Cyg X-1) is a galactic X-ray source...
- Simple English
16 hours ago · Hyksos ( / ˈhɪksɒs /; Egyptian ḥqꜣ (w) - ḫꜣswt, Egyptological pronunciation: heqau khasut, [4] "ruler (s) of foreign lands") is a term which, in modern Egyptology, designates the kings of the Fifteenth Dynasty of Egypt [5] (fl. c. 1650–1550 BC). [a] The seat of power of these kings was the city of Avaris in the Nile Delta, from ...
16 hours ago · The House of Palaiologos (pl. Palaiologoi; Greek: Παλαιολόγος, pl. Παλαιολόγοι, female version Palaiologina; Greek: Παλαιολογίνα), also found in English-language literature as Palaeologus or Palaeologue, was a Byzantine Greek noble family that rose to power and produced the last and longest-ruling dynasty in ...
