Why in Martian sky, Sun appears shrunken compared to Earth ??

 Answer is simple !!!

Mars is farther from the Sun than Earth is ......

Its just perspective and distance   !!!

On Mars,

            Sun didn't shrink.....

            We just moved farther away from it   !!!!!

What does the Martian sky look like ??

                  

Sun      :    A smaller,  brighter disc.

                  Still very bright. But not as " big " as our Sun  !!!

Sky colour      :    Not blue !!!

                              Mars' atmosphere is super thin.

                              Only 1% as  dense as Eatth.

                              With less air to scatter blue light, sky looks butterscotch during the day !!!

                             Bluish near the sun set.

Light      :     Only 43% of sunlight reaches Mars vs Earth.

                       So it is noticeably dimmer, like a cloudy day on Earth   !!!