What does the Milky Way fragmented spiral-arm patern suggest?

Why does a red dwarf emit no light? What is the deffintion of crewed missions? What are the disadvantages of the orbiter? Why does sunspots occur on the sun? What do you think would happen if The masses of Earth and the Sun were comparable instead of the Sun's mass being much greater? What was the planet in space? What are the other instruments used by astronomers in gathering information about stars? What is the other names for Mars? What is a ciel? Who was the Norse goddess of the sky? How many types of planets are in space? Which type of cloud would you expect to be involved in some form of precipitation? Why does venus have higher surface temperatures than mercury even though venus is farther from the sun? What time of day are tornadoes least likely to occur? What is surrounding space? Name of Germany's spy sattellite? Where is Orion in the summer sky? What is Apollo's hair color? Who invented the tardis? Whats the Definition of gibbons dealing with the phases of the moon?