![]() ![]() Objects on the far side away from the Sun, some will never be discovered from Earth. Question: How many Black Holes are there in the Milky Way Galaxy?Īnswer: More than 37 black hole candidates in our galaxy and more than 130 in total, with new ones still being discovered. The ones in or surrounding our Milky Way galaxy. Although black holes have been confirmed in and around many galaxies, this article will address only The distance from the centre of the galaxy is usually measured in light years The orbit of such a black hole is not always aligned with the "plane" of the galaxy, and may beĪt almost any angle and at any large distance from the centre of the galaxy. There must be a black hole between the source galaxy and us.Īn "Einstein Cross" surrounding the image of a distant quasar.Ĭredit: The European Space Agency's Faint Object Camera on board NASA's Hubble Space Telescope.Īn "Einstein Ring" surrounding the image of a luminous red galaxy.īlack Holes may be located at the centre of most (if not all) large galaxies, OR, smaller, independent black holes may orbitĪ galaxy as the precursor star did. By carefully analyzing the light from several images we can prove they had one source, and so This is known asĪn "Einstein Cross" or an "Einstein Ring". Is such that the black hole bends the light from it is such a way as to produce multiple images of the galaxy. In the case of a galaxy, the image of theĭistant galaxy is not only brighter, but the shape gets distorted, which we can also detect. Helps focus more light towards us than would normally occur causing the star to appear brighter. The starlight from the more distant object is bent around the black hole during its journey to us. not interacting with anything) itĬan be detected if it sits on a line between us and something further away (a star, or another galaxy). Even if a black hole has devoured everything in its local vicinity and is now "quiet" (i.e.Some of these are directedĪway from the black hole and can be detected. They are colliding with each other just before "going down the drain" (or "crossing the Event Horizon" as it is properly known) and emit high energy X-rays and Gamma rays. As gas, dust, matter, and radiation get closer and closer to a black hole, they speed up.Mass with a physically small volume is located there - i.e. But there is nothing detectable at the point they orbit. (For example, by studying the centre of our Milky Way Galaxy for many years, astronomers have plotted a bunch of stars and gas orbitingĪ common "centre of gravity". ![]() they affect the orbits of stars, gas clouds etc. their gravitational effect on the surrounding universe - i.e.Since neither matter (even particles) or light (any electromagnetic radiation) can escape from inside a black hole, they are That enters a black hole has no hope of escape either. But, light itself is also slower than this limit, so any light Matter cannot travel faster than the speed of light. Therefore any matter that falls into a black hole cannot escape since Out mathematically to be faster than the speed of light. ![]() The mass is so great, that the escape velocity (speed needed to escape from a body such as the Earth, Moon, etc.) works Its rotation (which affects the space-time around it), and potentially a residual charge. The main properties of a Black Hole are its mass (which still exists and attracts nearby objects), The end of their "fuel" - lighter stars may become white dwarfs or neutron stars where the properties of matter can still Small, but still contains all the matter and mass that was there before the collapse. The centre of the star, the entire star collapses into a "mathematical point" - i.e. When the nuclear furnace of a star's core can no longer provide the energy to counteract the gravitational pull RASC Calgary Centre - The Milky Way Galaxy's Black HolesĪrtist's rendition of a black hole affectingĪnswer: A Black Hole is the remains of a "dead" star that has undergone "gravitational collapse".
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