What is a single galaxy best described as containing?

How does solar radiation affect the atmosphere? Periwinkle for full sun? Is Jupiter the Star of Bethleham? What is putos orbit diameter? What did Judith Resnik accomplished? Which was the first spaceship to hit the moon? When a stalactite and stalagmite meet? Days and times of month moon changes shapes? What is the list of the major satellites gone up into space? What are some advantages of strip-lights? Do clouds form in the stratosphere? Ability to see things clearly near and far away? When the moon appears to be growing what do you call it? What were Robert Peary's exploration motivations? What Country was Gemini launched from? How does gravity play a role in determining climate? Why does water evaporates faster than other liquids? How does the sun looks like when its dark? What causes the North Star to change positions in the night sky? How did Neil Armstrong meet Buzz Aldrin and Micheal?