- Surrealist cinema (Wikipedia)
Surrealist cinema is a modernist approach to film theory, criticism, and production, with origins in Paris in the 1920s. The Surrealist movement used shocking, irrational, or absurd imagery and Freudian dream symbolism to challenge the traditional function of art to represent reality. Related to Dada cinema, Surrealist cinema is characterized by juxtapositions, the rejection of dramatic psychology, and a frequent use of shocking imagery. Philippe Soupault and André Breton’s 1920 book collaboration Les Champs magnétiques is often considered to be the first Surrealist work, but it was only once Breton had completed his Surrealist Manifesto in 1924 that ‘Surrealism drafted itself an official birth certificate.’
- Astronomers Unveil Strong Magnetic Fields Spiraling at the Edge of Milky Way’s Central Black Hole (eventhorizontelescope.org)
A new image from the Event Horizon Telescope (EHT) collaboration has uncovered strong and organized magnetic fields spiraling from the edge of the supermassive black hole Sagittarius A* (Sgr A*). Seen in polarized light for the first time, this new view of the monster lurking at the heart of the Milky Way Galaxy has revealed a magnetic field structure strikingly similar to that of the black hole at the center of the M87 galaxy, suggesting that strong magnetic fields may be common to all black holes. This similarity also hints toward a hidden jet in Sgr A*. The results were published today in The Astrophysical Journal Letters.
- Sagittarius A
A good bookshop is just a genteel Black Hole that knows how to read.
Terry Pratchett, Guards! Guards!
- Black hole (Wikipedia)
A black hole is a region of spacetime where gravity is so strong that nothing, including light or other electromagnetic waves, has enough energy to escape it. The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole. The boundary of no escape is called the event horizon. Although it has a great effect on the fate and circumstances of an object crossing it, it has no locally detectable features according to general relativity. In many ways, a black hole acts like an ideal black body, as it reflects no light. Moreover, quantum field theory in curved spacetime predicts that event horizons emit Hawking radiation, with the same spectrum as a black body of a temperature inversely proportional to its mass. This temperature is of the order of billionths of a kelvin for stellar black holes, making it essentially impossible to observe directly.