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physical object > natural object > celestial body > radio source > Sagittarius A

Sagittarius A
subject			fact

Sagittarius A	has diameter 12 pc
	is a part of Sagittarius
	has definition A radio source (the galactic center). (Sgr A West is a thermal source; Sgr A East is a nonthermal source.)
	has definition The very center of the Milky Way, Sagittarius A* is a strong source of radio waves and probably a massive black hole.
	is an instance of radio source
radio source	has wavelength radio
	is a part of celestial sphere
	has catalog radio source catalog
celestial body	has spectra
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

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