What are the advantage and disadvantage of astronomy?

What best describes how NASA's Kennedy Space Center benefits Florida? What are some areas related to the study of constellations? How does water vapor enter the air? Why three phases is used in polyphase system instead of 6 12 or more number of phases? How many newtons are in space compared to earth? What color describes second full moon in a month? Who created the first solar system model? What gives earth its true shape? How does the flag stay on the moon? What are the pros and cons of orbiting spacecraft and spacecraft that land on planet? Is Venera bigger than Earth? Do the suns rays concentrate over a smaller area of land in winter? What froms when nebulae particles begin to join? How much money does NASA spend to build a rocket? What was supposed to happen on Apollo 13? What are two words that come from the Old English words related to the moon? When is the next MJD date? Can you spot? What color can be seen in the color wheel? Why does the moon sometimes seem blue?