What is on operrata?

Does sun revolve around any celestial body? What is the modern day connection of Zeus? What did Yuri Gagarin invent? When was Solar System - song - created? Who discovered Fahrenheit? What is the climax for the story Catch the Moon? Who was the first person to go to other planets? What is the best term to describe how light waves from a star are affected as the star moves away from Earth? What was Bill Gates birthstone? What is the difference in atmospheric flight and space flight? What is the surface pressure of the Moon? How high above sea level is Michigan City? Where is gravity greater earth or on moon? Why did the astronauts go to the moon? What is the difference between an object and an image? Why hasn't anyone been on Jupiter? Why do rainbows exist? Did Yuri gagarin have any nicknames? What was Neil Armstrongs famous saying? Where do the Suns rays hit Earths surface nearly at right angles?