The question is as important as money itself. Trick question - it's not! The stars, like the sun, appear to move from east to west. Why do celestial bodies appear to move from east to west across the sky? Why would there be no power to a switch? There are two major problems with this. There are also some quite noticeable greasy fingerprints. What are the advantages and disadvantages of nuclear power? Some advantages of using a solar hot water system is it uses renewable energy, and it lowers heating costs. The advantages of nuclear power:High energy density. Hydroelectric energy is generated by rushing water. Solar energy is generated using solar panels that face the sun and gather the energy. Solar panels lose their ability to produce solar electricity as they age for any number of reasons, so a warranty will guarantee a certain level of production after a certain number of years. A star does not have a fixed number of sides as a triangle or quadrilateral does. How many sides does a star have?