The most common way to become infected with giardia is after swallowing contaminated water. Giardia parasites are found in lakes, ponds, rivers and streams worldwide, as well as in municipal water supplies, wells, cisterns, swimming pools, water parks and spas.
Andreas Cellarius's illustration of the Copernican system, from the Harmonia Macrocosmica (1708). Heliocentrism, or heliocentricism, is the astronomical model in which the Earth and planets revolve around the Sun at the center of the Solar System. The word comes from the Greek (á¼¥Î»Î¹Î¿Ï helios sun and ÎºÎ­Î½ÏÏÎ¿Î½ kentron center).
In the heliocentric system, the Sun is considered to be the center of the solar system. All of the planets rotate about the Sun. The Moon rotates around the Earth, and thus moves around the Sun with the Earth.An illustrationof the heliocentric model of the solar system, from the Harmonia Macrocosmica star atlas of Dutch-German cartographer Andreas Cellarius, circa 1660.odeled the movements of the Sun, the Moon, and the five known planets in the skies above, using a heliocentric system of orbits. Born: 1473 in Torun, Poland. Died: 1543 in Frombork, Poland. Quotation: Finally we shall place the Sun himself at the center of the Universe.