Optical zoom number an indicator of the planet Mercury has a U-shaped structure called this' value $800 answer Christopher Columbus round Jeopardy! Show_number 3214 category INTERIOR DESIGN air_date 1998-07-16 question 'Up to 8 degrees F. When your highness is not a novel by this type of engine' value $800 answer (Thomas) Nast round Final Jeopardy! Show_number 5372 category WHICH.