6,266 Posts

andromedaphysics The above image is an artists conception of a supermassive black hole and accretion disk.
Supermassive black holes are the largest type of black holes, which can be hundreds of thousands to billions of solar masses and is found at the center of most galaxies. These giants have properties that distinguish them from lower mass classifications. The average density of a supermassive black hole can be less than the density of water. This is because the Schwarzschild radius is directly proportional to the mass, while density is inversely proportional to the volume. The density of a black hole is inversely proportional to the square of the mass, therefore higher mass black holes have lower density. The tidal force of the body at the event horizon is inversely proportional to the square of the mass meaning a person standing on Earth and one at the event horizon of a 10 million solar mass black hole experience about the same force between their head and feet. The way these form is still debated and being researched. Astrophysicists agree that once a black hole is in the center of a galaxy, it can grow by accretion of matter and by merging with other black holes. Another hypothesis is that primordial black holes may have been produced directly from external pressure in the first moments of the Big Bang. There needs to be enough matter in a small enough volume for the formation of supermassive black holes which makes it a difficult factor of growth. #astronomy #astronomer #space #comos #cosmology #astrobiology #astrophysics #interstellar #outerspace #universe #multiverse #galaxy #stars #planets #nebula #supernova #comet #asteroid #astronaut #spaceshuttle #spacetravel #Nasa #Hubble #telescope #science #physics #constellation #solarsystem
8h

» LOG IN to write comment.

gauzitoo Feliz Parabéns pra Mim!
#comemorando #meu # aniversário #comos #brothers #happy #birthday #tome
8h

» LOG IN to write comment.

Nashville lucas s2

» LOG IN to write comment.

Amaro Sem Luta Ñ Havera Conquista !

» LOG IN to write comment.

andromedaphysics Happy Earth Day!! "Look again at that dot. That's here. That's home. That's us. On it everyone you love, everyone you know, everyone you ever heard of, every human being who ever was, lived out their lives. The aggregate of our joy and suffering, thousands of confident religions, ideologies, and economic doctrines, every hunter and forager, every hero and coward, every creator and destroyer of civilization, every king and peasant, every young couple in love, every mother and father, hopeful child, inventor and explorer, every teacher of morals, every corrupt politician, every "superstar," every "supreme leader," every saint and sinner in the history of our species lived there-on a mote of dust suspended in a sunbeam.

The Earth is a very small stage in a vast cosmic arena. Think of the endless cruelties visited by the inhabitants of one corner of this pixel on the scarcely distinguishable inhabitants of some other corner, how frequent their misunderstandings, how eager they are to kill one another, how fervent their hatreds. Think of the rivers of blood spilled by all those generals and emperors so that, in glory and triumph, they could become the momentary masters of a fraction of a dot. Our posturings, our imagined self-importance, the delusion that we have some privileged position in the Universe, are challenged by this point of pale light. Our planet is a lonely speck in the great enveloping cosmic dark. In our obscurity, in all this vastness, there is no hint that help will come from elsewhere to save us from ourselves.

The Earth is the only world known so far to harbor life. There is nowhere else, at least in the near future, to which our species could migrate. Visit, yes. Settle, not yet. Like it or not, for the moment the Earth is where we make our stand. It has been said that astronomy is a humbling and character-building experience. There is perhaps no better demonstration of the folly of human conceits than this distant image of our tiny world. To me, it underscores our responsibility to deal more kindly with one another, and to preserve and cherish the pale blue dot, the only home we've ever known." - Carl Sagan.
2d

» LOG IN to write comment.

andromedaphysics An Intermediate black hole is a hypothetical class of black holes with a mass in the range 100 to one millions solar masses; more than a stellar black hole but less than a supermassive black hole. The strongest evidence for IMBHs comes from low-luminosity active galactic nuclei. Just like any other black hole, they only pull matter and energy into themselves as much as others stars or cosmic objects with similar masses. Intermediate black holes don't form from collapsing stars because of their huge mass. There are a couple ways that have been thought to be the existence of IMBH; merging of stellar mass black holes, runaway collision of massive stars in dense stellar clusters, and the primordial black holes formed in the Big Bang. There was a study conducted in Maryland on a galaxy called M82 which the object focused on was M82 X-1 ( Thought to be a medium sized black hole). The data revealed a pair of repeating oscillations in the black holes emissions. They occurred 5.1 times a second and 3.3 times a second. This ratio, 3:2, allowed them to determine the black holes mass which was around 428 suns.
Image Credit: NASA
#astronomy #astronomer #space #comos #cosmology #astrobiology #astrophysics #interstellar #outerspace #universe #multiverse #galaxy #stars #planets #nebula #supernova #comet #asteroid #astronaut #spaceshuttle #spacetravel #Nasa #Hubble #telescope #science #physics #constellation #solarsystem
3d

» LOG IN to write comment.

» LOG IN to write comment.

» LOG IN to write comment.

viviajardim Ontem a noite foi nossa #comos amigosaldeiadolago que delicia niver meu da Elisete 4d

» LOG IN to write comment.

andromedaphysics Stellar black holes are born with a bang. They form when a very massive star (at least 25 times heavier than our Sun) runs out of nuclear fuel. These are the smallest of the black holes but are still one of the strongest forces in the universe. With no force to check gravity, a budding black hole shrinks to zero volume at which point is infinitely dense. Even the own light from the same star can not escape and becomes trapped in its orbit or may even be lost where no man has ever gone before. This place is called the event horizon-the point from which any escape is impossible because it requires to move faster than the speed of light.
Image Credit: Alain Riazuelo
#astronomy #astronomer #space #comos #cosmology #astrobiology #astrophysics #interstellar #outerspace #universe #multiverse #galaxy #stars #planets #nebula #supernova #comet #asteroid #astronaut #spaceshuttle #spacetravel #Nasa #Hubble #telescope #science #physics #constellation #solarsystem
4d

» LOG IN to write comment.