Why are astronomical bodies such as planets and stars round.

Gravity causes all parts of a planet or star to be attracted or pulled toward the center of a mass, causing it to be a sphere. If two objects are moving at the same speed, the object with more mass will have more kinetic energy.

Explanation:

Gravity causes all parts of a planet or star to be attracted or pulled toward the center of a mass, causing it to be a sphere. ... If two objects are moving at the same speed, the object with more mass will have more kinetic energy.

Explanation:

the answer for apex is the lowest

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.