What is anaurysm?

How is the constellation centaurus similar to the milky way? When was the Chinese magnetic compass invented or made? The Sun crosses the celestial equator going north This is known as the spring? Is a pentagon concave? What is ballon rocket Aim? What was the final stage of the space program to reach the Moon.? What are the different parts of a rocket? What level of the atmosphere can a hot air balloon travel? Why is afterimage green when you stare at a magenta picture? When The length of time that daylight occurs at a location during one day is called the locations? How did Dalek Caan escape the Doctor in Evolution of the Daleks? Is 6 pm night or day? What is the name of the point on Earth's orbit when Earth is closet to the sun? Why was it impossible to separate the Magdeburg Hemispheres? What do cosmonauts get from their countries? What are the elements of Gravity? How high does a rocket have to go above Earth's surface until its weight is half what it would be on Earth? How many people have been in space since 1961? What is the meaning of the Hindi word astra? Who decided on what colors rainbows should have?