How is the Milky Way galaxy best described?

How much money do astronmer get? Who made the first catalog of stars and the first map of the skis? Why does the world have tornadoes? Titan is a moon of this planet? What wheel do you use on a microscope to make the image clearer? What two factors will affect gravitational attraction? What color is the watermark in a US 20 dollar bill under ultraviolet light? How can you tell the difference between a satellite image of an anticyclone and a depression? What scientist was the first to suggest that earth and other planets in the solar system revolve around the sun? Is it possible to feel fluttering at 8weeks pregnant? does the moon always appear full somewhere on earth? How many days was the Apollo 11th mission? How do two rainbows occur? What gives star heat and light? How many total moons are there in space? When were space rover invented? Why do people need the atmosphere to live? Why does a star produce light? What determines the color of stars in the night sky? What are the 5 examples of gravity?