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.
But wait a second and think. The Moon follows the Earth around the Sun in its orbit, and if you didnât have the Earth, the Moon would really be orbiting the Sun. So can we say that the Moon is really orbiting the Sun? No. But the case is pretty compelling. First, take a look at the orbital velocity of the Moon. The Moonâs velocity around the Moon is a mere 1 km/second. But the Moonâs velocity around the Sun is 30 km/sec; same as the Earth. And hereâs something stranger. the Moon doesnât follow a spiral pattern around the Sun, as you would think, but it always follows a convex path compared to the Sun.