What is the definition of cirrus in science?

How many moons does vesta have? What is the different between the first and second phases of the prewriting process? What was the first discovery in space? Why most of the ultraviolet waves emitted by the Sun do not strike Earth's surface? What have we found out by using the hubble telescope? What organisms release carbon from the atmosphere? What process does stars convert mass in to great amounts of energy? Why is sun protection important? What would life be like without satellites in the orbit? How much gravity is their in space? In which region of the Sun does energy move as waves that transfer from atom to atom photosphere corona core radiative zone chromosphere convective zone? Why do spacecrafts lose their large fuel tanks and booster rockets once they have left the earth's surface? What should you write on paper for your balloon to let go in the sky? What does a orange object look like in a red light? What does an astrobiologist study? How many balls of string does it take to reach the moon? Is the moon and the sun the same size during a total eclipse? Is paintings are prettier than sculptures an scientific hypothesis? Why the sun turns red when going down? What happens when the Earth comes directly between the Sun and the Moon causing Earth's shadow to be cast upon the Moon?