The orbit a planet follows around the sun is not circularbut .nominal

elliptical.

She decided a reliable used car would be a bettervalue than a new auto.linearmediocresheepishchronic

mediocre.

The barrel of water had sat without moving for weeksand was now .haplessporoustorridstagnant

stagnant.

It seems there is a typo in your question. I believe you meant to say that the orbit a planet follows around the sun is not circular but ____. However, I'm unable to understand what you intended to write after "but." Please rephrase or provide more information so that I can assist you better.