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physical object > natural object > particle > hypothetical particle > dark matter > massive compact halo object > black hole > massive black hole

massive black hole
subject			fact

massive black hole	has definition Utilized in a theoretical model for quasars and active galactic nuclei, according to which the energy source is due to infall (and resultant heating) of gas and stars onto a supermassive central black hole.
	is a kind of black hole
black hole	has antonym white hole
massive compact halo object	is a part of halo
	has acronym MACHO
dark matter	is a part of dark halo
	has synonym hidden mass
hypothetical particle	has acceptance status hypothetical
physical object	has location or center of gravity
	has angular momentum
	has mass
	has velocity
	has momentum
	has temperature
	has volume
	has extent
	has material
particle	obeys uncertainty principle
	has frequency inversely proportional to the wavelength
	has wavelength inversely proportional to its momentum
	has charge
	has mass

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