What are deuterstrome?

What is the analemma of the sun? Where is the blue diamond mined? Was Albert Einstein a Christian? Why can we see the moon from earth? Does mars have moons or rings? What are the colors of the stars in the eridanus constellation? Who is the father of rocket propulsion? Who made the first lights? How do counterweights affect launch on trebuchets? What can you stand in front of in broad daylight but you cannot see it? Was the Columbia one of the first space shuttles built? What is the line that separates the light section and the dark sections on the earth and the moon? Will there be a February 29th in the year 2100? True or false Particles in a nebula are attracted to one another because of gravity? 2 differences between the sun and a planet? Have levels of greenhouse gases changed? What features of the moon did Thomas Harriet see through the telescope? What are things that revolve? What are you called if you study extraterrestrial life? On Apollo 13 the crew members were least worried about what?