a straight line passing from side to side through the center of a body or figure, especially a circle or sphere

a round solid figure, or its surface, with every point on its surface equidistant from its center.

a large, bowl-shaped cavity in the ground or on the surface of a planet or the moon, typically one caused by an explosion or the impact of a meteorite or other celestial body

scattered pieces of waste or remains

cause (something) to change direction by interposing something; turn aside from a straight course

the action of one object coming forcibly into contact with another

a small body of matter from outer space that enters the earth's atmosphere, becoming incandescent as a result of friction and appearing as a streak of light

a person holding an opinion at odds with what is generally accepted

the intrinsic brightness of a celestial object (as distinct from its apparent brightness diminished by distance)