The force of gravitation between two spherical bodies is Gm1 m2 /r2, where r is separation between their dash

True

Explanation:

The law of gravitation states that all bodies attracts every other particle with a force proportional to the product of their masses & inversely proportional to the square of the distance between them.

the working equation for the angular size is the product of the physical size and 360 degrees divided by the product of two pi and distance from earth. the minimum size would be 0.559 degrees while the maximum size would be 0.49 degrees. 

luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.