What is the size of Varuna?

Why does Jupiter have 16 moons and the earth only has one? Do tornadoes never touch the ground? What would happen to the moon if earth stopped exerting the fource of gravity on it? Are stars cooler than the sun brighter or dimmer? First Indian man landed on moon? When was the scientist tull jethro born? What part of nature does Zeus effect? When astronomers say that callisto is a differentiated body they mean that it? When water vapor becomes liquid water due to cooling called? What are the probable source of smoke found in the atmosphere? What would a box of matches be useful in space? How does an area's location affect the amount of solar radiation received? How do the rain clouds form? What is found in the Milky Way galaxy's galactic halo? Is the sun a giant star in our solar system? What two forces cause nebula to develop into the sun? How would the world be different without the space race? What is the disturbance of the motion of one heavenly body by another is called? What would happen to the moon if earth had no gravity? Does a hot air balloon float or fly?