What is a scratus?

What is a mode of transportation into space? What would happen to Earth if there were no light? What is the name of scientists who use telescopes to study asteroids? What is planet has the most known moons? What was the name of America's first manned space flight? How do shadows provide evidence that the earth is turning? Can the Earth produce its own light? What is the declination of Bernard star? What were the contributions of Nestorius muslimsand Jews to medieval science? What methods are used to calculate the surface temperature of a planet? What is the biggest mountain? What are the names of Jupiters rings? Layer of the sun's atmosphere above the photosphere? What is the difference between light and darkness? What layer of the atmosphere does most whether occur? What would cause a balloon to expand if taken to the top of a mountain? Who discovered laser? What is the problem with the Apollo 13 trajectory being too low? When did Apollo 11 leave earth? What is the most gravity force that creates tides?