What is the adjective form for planet?

Who was the 5Th doctor of Doctor Who? First artificial satellite in space? Which of the is not a unit of time leap year or light year? At the Equator you can see all constellations? What is a gravity light? When was Evening Observer created? How hot is a orange star? How would scientist record their observations? Is the cummulus cloud low high middle or low? How the universe is like raisin bread dough? Which of these colors of lights has the longest wavelenght is it A.blue B.green C.red D.yellow? Was John Glenn the first astronaut to join the NASA program? If clouds absorb only a small amounts of solar radiation how is the earth heated? What did Yuri gagarin do first and for which country? What elements are in a protostar? Is a candle illuminated? What is the space across which impulses travel? What is the myth of canis major? How old is Celin Dione? Which fores of gravity will be more the sun or mars?