Milky Way Galaxy physics
type: Concept
narrower: Galactic centre

Oort constants
type: Concept
related: Galactic centre

Galactic centre
type: Concept
contributor: AAS Frey.Katie
contributor: AAS Frey.Katie Admin
modified: 2021-08-24T15:26:26.383Z
modified: 2020-11-09T14:51:42.496Z
alternative label: Galactic Centre
alternative label: Milky Way center
alternative label: Milky Way Galaxy nucleus
alternative label: Center of the Milky Way
broader: Milky Way Galaxy physics
definition: The rotational center of the Milky Way galaxy located in the direction of the Sagittarius constellation at a distance of 7.62 ± 0.32 kpc. Its equatorial coordinates (J2000 epoch) are: R.A. 17h45m40.04s, Dec. -29° 00' 28.1''. The Sun orbits around the Galactic center once every 200 million years at a speed of 220 km per second. It is believed that there is a supermassive black hole at the Galactic center.
preferred label: Galactic center
related: Oort constants