How much does a galaxy bar weigh?

What sign is put at the end of a sentence to show it is a question? Where and in whic continent are there 6 months day and 6 months night? What is the bright star you can see right next to the moon tonight Sept 29th 2009? Why do eclipses affected the tide? Which process caused rainwater to disappear in outside hot air? Why is it dangerous to look at a eclipse? What air masses are responsible for fog and drizzle? Why are light houses often found on barrier islands? Who was the first person to use a thermometer? What does a cloud cover symbol represent? What is meteor's nickname? How sunlight effect color? What is the right ascension and declination of constellation Capricornus? Who were the first to land on the moon the Russia or US? What is a common nickname for the constellation cancer? Do aliens live in mars? How high is New Haven CT above sea level? Why does the sun have only a little effect on tides? How did the universe started? What are the two forces acting on the particles inside a nebula that affect its balance and how do they affect particles?