Why did the Chinese develop the compass?

How do you you say Pluto in Chinese? Why stars a natural source of light? Was Neil Armstrong the only man to ever walk on the moon? How many total NASA missions have failed? What advantages does the Hubble telescope have? What color solar cover is best? Why does gravity never repels? Where are planet hotbeats copy abilities in milky way wishes Kirby? What is above the clouds when it rains? What is the position of the moon sun and the earth during a neap tide? What is the summary of the story the case do the shining blue planet? HOW DO ASTRONAUTS DO THERE LAUNDRY? What happens in aphotic zone body of water? Why does the moon looks smaller from the earth? Is moon sand always dry? What is a synchronus rotation? Why don't caves have many windows? What indicates a stars temperature and brightness? What 2 types of planets can be found in your solar system? What are two things that absorb radient energy from the sun?