What is the scientific name for somebody who mends clocks and watches?

What type of noun is milky way? Layer that surrounds the radiation zone of the sun? What is the orbital distance of a average satellite? How do you describe a hot air balloon with descriptive words? Is the Andromeda galaxy in the Northern Hemisphere? When the Moon appears to be shrinking it is called? Is the amount of solar energy intercepted by earth affected by the presence of clouds in the sky? What is the method to track changes in requirements across different phases of development? What Mountain is sacred to Apollo and the muses? Total energy given off by the sun? How do we think Earth's Moon formed? A ring eclipse is? What does mooning at someone mean? What is the suns wheather? Which type of star is NOT undergoing nuclear fusion? What are some of the montgolfier brothers achievements? How heavy is the heaviest space shuttle? Planet has almost no atmosphere? Why did Judith Resnik want to be an astronaut? To within ten how many known moons are there revolving the other planets?