由于星系的重力产生了向心力,所以星系的物质体是环绕着一个中心点运行的。
Galactic matter orbits around a central point because its mutual gravitational attraction creates centripetal forces.
由于星系的重力产生了向心力,所以星系的物质体是环绕着一个中心点运行的。
Galactic matter orbits around a central point because its mutual gravitational attraction creates centripetal forces.
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