Why sun has elliptical shape on the time when rising and sun setting ? It is due to

The reddish appearance of rising and setting sun is due to

The shape of sun is oval like when it is at horizon. It is due to

Why the sun looks red at the time of setting ?

A planet moves around the sun in an elliptical orbit. When earth is closest from the sun, it is at a distance r having a speed v . When it is at a distance 4r from the sun its speed will be:

Why the rising sun looks to be red, explain ?