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You may have heard occasional black hole references in your day to day life whether it is the movies you watch or your average science classroom. Looking into depth of how black holes are created and their characteristics, here are some answers. Suppose the core of a star becomes extremely large to the point where it is approximately 2.5 times larger than the sun, larger than 15m, ¬†at this point stars are not able to prevent gravity from collapsing and eventually turning themselves into black holes. Scientists measure black holes to be of zero volume, and measured to have an infinite density therefore anything that passes a certain scope of the black hole will be captured for eternity. Including the speed of light. An interesting fact about black holes is that they are invisible and when first discovered were called “invisible stars”. You might be wondering how they are discovered if they are invisible. Black holes are located by how they affect the stars and gas around them. According to a theorist, John Weeler, black holes can found through the notion of women dancing in white dresses with men in black suits. You may only see the women dancing and spiraling but you may envision the partners they must be dancing with. The “women dancing” are the gas and star particles that emerged from other stars breaking , that orbit around the black hole. This orbitation emits heat from the accretion disk, certain types of energy and speed that gives a clearer definition to scientists that observe black holes. There are 3 known types of black holes; Stellar, Supermassive and Miniature. Stellar stars are the type of black holes discussed before. Supermassive black holes are located in our galaxy, the Milky Way, which usually grow as they are approached by other stars around. Miniature black holes are strictly based on theories. The space around black holes is said to be looped to the point where it ends up closing in on itself. Some might consider what physical evidence exists of black holes. Astronomers found evidence of a supermassive black hole after examining the energy and heat that was surrounding it and data was recorded by the Hubble Space Telescope in 1994. Black holes are created when matter is condensed into a small area. There are 4 main outstanding black holes that have been identified. The first black hole is the M87, which consists of a galaxy with a 3.5 billion solar mass. It is surrounded of heated material that is supposed to be 5000 light years away and was the black hole recorded by the Hubble Space Telescope. The second one being Cygnus X-1, that is categorized as a stellar black hole that is considered to be 6500 light years away, consisted of a blue supergiant star and the x-ray part of it is the black hole. The third one is known as Sagittarius, the reason of the name being that it is in the direction of the constellation and is the heart of the Milky Way Galaxy, consisting of 4 million suns. Last but not least, the black hole Centaurus A, with the obvious name being that it is in the direction of the constellation and contains 55 million solar mass, physically looking like a spiral galaxy.