There are many harmful health effects of the sun, including skin cancer. The sun puts off harmful ultraviolet rays that are considered carcinogens.Continue Reading
Exposure to ultraviolet rays greatly increases a person's risk of skin cancer. According to the United States Environmental Protection Agency, the majority of skin cancers can be prevented by limiting exposure to the sun. Protecting the skin outdoors also goes a long way in preventing skin cancer. People should wear clothing that covers the skin or use a quality sunscreen before heading outdoors.
Other harmful health effects of sun exposure include eye damage and skin damage. People exposed to the ultraviolet rays of the sun are more likely to develop cataracts, which in turn causes vision loss. Exposure to the sun can also cause skin to thicken around the eyes or increase the chances of eye-related skin cancers. Skin damage occurs when a person is continuously exposed to the sun without protection by causing premature aging. The sun can also cause the skin to develop actinic keratoses, which are dark skin growths.
The EPA website also states that a suppressed immune system is also a harmful effect of the sun. When continuously exposed to UV rays, the body loses some of its ability to fight off infections.Learn more about Astronomy
The first person to theorize that the planets revolve around the sun was Aristarchus of Samos, a Greek astronomer and mathematician who lived in the third century B.C. His theory conflicted with the dominant geocentric models of the time, and it was not widely accepted.Full Answer >
The geocentric theory, or the Ptolemaic system, was one of the earliest theories regarding the origins of the universe, and it posited that the sun, stars and even the other planets revolve around the Earth. Ptolemy was not the first to suggest this theory, though, as documents indicate that Aristotle and Plato discussed this paradigm.Full Answer >
Saturn orbits the sun in approximately 29.7 Earth years. It orbits the sun in an elliptical path, just as all of the planets in the solar system do.Full Answer >
Copernicus believed that the planets in the solar system revolved around the sun, instead of believing that the Earth was the center of the solar system. His model included the position of the Earth and retrograde revolutions.Full Answer >