is a black hole a sphere?
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They're spheres. And they're definitely not funnel shaped. The gravity you feel from an object depends on two things: the object's mass, and your distance from that object. ... The size of an event horizon of a black hole depends on the gravity, so really the event horizon is a sphere surrounding the black hole.
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A black hole is a concentration due to gravity, of well known matter that exists in stars and nebulae including light, to the point of infinity. Dark Matter is so called because, though its gravitational field is clearly felt, it's still invisible to us, and its constituents still unknown.
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Black holes are aptly named because they are completely Black- that is, no observable radiation is emitted from them in the Electromagnetic Spectrum. So scientists use a method called Gravitational lensing.
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In non-Euclidean geometry, squares are more generally polygons with 4 equal sides and equal angles. In spherical geometry, a square is a polygon whose edges are great circle arcs of equal distance, which meet at equal angles.
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Black hole singularities are created after the core of a very massive star collapses beyond an imaginary sphere called the event horizon. ... The differences are that black hole singularities, of course, do not contain all of the matter and energy in the Universe because there are so many of them.
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A sphere has no sides at all. It has an infinite number of infinitesimally small surface areas, if you will. A sphere has an inner and an outer surface.
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In the center of a black hole is a gravitational singularity, a one-dimensional point which contains a huge mass in an infinitely small space, where density and gravity become infinite and space-time curves infinitely, and where the laws of physics as we know them cease to operate.
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As in most processes in astrophysics, the shape of a star is always determined by gravity, which tends to push everything towards its center. If gravity is symmetrical, like for a single star, it will form an almost perfect sphere, and is only slightly affected by the rotation of the planet and its magnetic field.
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A sphere has no edges and therefore no corners. It has one curved face that goes all the way around. A square based pyramid, a triangular based pyramid and a cone have a point at the top.
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No, not in any way. The pupil is the transparent portion of your eye in which sits a lens that focuses light onto your retina. A black hole is an extreme deformation in spacetime caused by a very high density of mass and/or energy.
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Micro black hole. ... It is possible that such quantum primordial black holes were created in the high-density environment of the early Universe (or Big Bang), or possibly through subsequent phase transitions. They might be observed by astrophysicists through the particles they are expected to emit by Hawking radiation.
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It has a diameter of about 78 billion miles. For perspective, that's about 40% the size of our solar system, according to some estimates. And it's estimated to be about 21 billion times the mass of our sun. So there you have it, black holes can be millions of times larger than suns and planets or as small as a city.
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The defining feature of a black hole is the appearance of an event horizon—a boundary in spacetime through which matter and light can pass only inward towards the mass of the black hole. Nothing, not even light, can escape from inside the event horizon.
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Black holes and wormholes are similar, except for one thing: where a wormhole creates a bridge between two points, a black hole leads to a dead end.
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Black holes are not solid, nor are they hollow. The black hole anatomy consists of two parts: a singularity and an event horizon. ... The mass of a black hole is presumably located at the core of the black hole, though the notion of any mass being located within zero volume is hard to make sense of.
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What is the relationship between a supergiant star and a black hole? A black hole is the remains of a supergiant star that collapsed into itself. Why can't light escape a black hole? Gravitation near the surfaces of these tiny shruken stars is so enormous that not even can escape from them.
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A sphere is a solid figure that has no faces, edges, or vertices. This is because it is completely round; it has no flat sides or corners. A cone has one face, but no edges or vertices. Its face is in the shape of a circle.