can also refer to the sun-shading eyepiece-type, although the term is not exclusive to these. Also in use is the derivative abbreviation, shades.
A space sunshade or sunshield can be described as analogous to a parasol that s or otherwise reduces some of a star's rays, preventing them from hitting a planet and thereby reducing its insolation, which results in less heating of the planet.
rear(a): located in or toward the back or rear; "the chair's rear legs"; "the rear door of the plane"; "on the rearward side"
The space or position at the back of something or someone
stand up on the hind legs, of quadrupeds; "The horse reared in terror"
The hindmost part of an army, fleet, or line of people
The back part of something, esp. a building or vehicle
the back of a military formation or procession; "infantrymen were in the rear"