As they orbit around each other, these black holes emit ripples in spacetime called gravitational waves that carry angular momentum away from the binary, causing the black holes to orbit more closely together. Eventually, when the black holes are close enough together, their gravitational attraction ...
Some black holes apparently have nonstellar origins. Various astronomers have speculated that large volumes of interstellar gas collect and collapse intosupermassive black holesat the centres ofquasarsandgalaxies. A mass of gas falling rapidly into a black hole is estimated to give off more than 100...
supermassive black hole (SMBH), ablack holemore than one hundred thousand times themassof theSun. Nearly every largegalaxyhas a supermassive black hole at its centre.Active galactic nuclei, such asSeyfert galaxiesandquasars, are powered by supermassive black holes. The largest supermassive black ho...
TheMilky Waycould contain over 100 million black holes, though detecting these gluttonous beasts is very difficult. At the heart of the Milky Way lies a supermassive black hole —Sagittarius A*. The colossal structure is about 4 million times the mass of the sun and lies approximately 26,000l...
Several theories have been proposed to describe the formation of black hole seeds in the early Universe and to explain the emergence of very massive black holes observed in the first thousand million years after the Big Bang1–3. Models consider dif
planetsThe conditions for the Sun and oblate spheroidal planets in the solar system to reduce to black holes is investigated. The metric tensor exterior to oblate spheroidal masses indicates that for the Sun to reduce to a black hole, its mass must condense by a factor of $2.32250imes 10^5...
Once inside the event horizon, all "events" (points in space-time) stop, and nothing (even light) can escape. The radius of the event horizon is called the Schwarzschild radius, named after astronomer Karl Schwarzschild, whose work led to the theory of black holes. Types of Black Holes ...
Black holes generally come in two sizes: big and really big. As they are so dense, they are measured in terms of mass rather than size, and astronomers call these two groups of stellar mass black holes (as in, equivalent to the mass of the sun) and supermassive black holes. Why there...
Three Steps to the Edge of the Universe The Sun, Black Holes, and Darkmatter的书评 ··· ( 全部0 条 ) 论坛 ··· 在这本书的论坛里发言 + 加入购书单 谁读这本书? ··· 二手市场 ··· 在豆瓣转让 手里有一本闲着? 订阅关于Three Steps to the Edge of the Universe The Sun...
So, while stellar black holes don’t impact the universe quite like their supermassive counterparts, they’re solidly the silver medal recipients when it comes to massive objects in outer space. Most stellar black holes clock in at around 10 solar masses on average, but some impressive outliers...