Microorganisms causing diseases that characteristically are waterborne prominently include protozoa and bacteria, many of which are intestinal parasites, or invade the tissues or circulatory system through walls of the digestive tract. Various other waterborne diseases are caused by viruses.
As the Moon revolves around Earth, both objects also progress in orbit around the Sun. After completing one revolution with respect to the stars, the Moon must continue a little farther along its orbit to catch up to the same position it started from relative to the Sun and Earth.
Brahe placed Earth at the center of the universe, with the Sun and the Moon revolving about it. However, instead of also requiring the other planets to revolve around Earth, in Brahe's model the planets revolved about the Sun as it revolved about Earth (see figure 4).