The Essential Sun
- The Sun is by far the most important source of energy for life on earth
- It is 109 times the size of the earth
- it has 330,000 times the mass of earth
- Accounts for 99.86% of the total mass of the solar system
- It formed approximately 4.6 Billions years ago
- Has been regarded by some cultures as a deity
- The rotation of earth and its orbit around the sun are the basis of solar calendars, one of which is the predominant calendar in use today
|
The Sun Activity
- The Solar Constant: The amount of power that the sun deposits per unit area that is directly exposed to sun light
- The value of the solar constant is equal to approximately 1,368 watt/sqm at a distance of one astronomical unit (The distance from Earth To the Sun)
- Sunlight at the surface of earth is attenuated by Earth's Atmosphere, so less power arrives at earth's surface that leaves the Sun
- Sunlight at the top of Earth's atmosphere is composed of 50% Infrared light, 40% visible Light, and 10 % Ultraviolet Light
- The atmosphere filters out over 70% of solar Ultraviolet light, specifically at the shorter wavelengths
- Ultraviolet light from the Sun has antiseptic properties and can be used to sanitize tools and water. It also causes sun burn as well as sun tanning and Vitamin D production
- Ultraviolet (UV) light is strongly attenuated by earth ozone's layer
|
Sun Safety First. Protect From The Sun Rays
- Our bodies have been conditioned to make good use of our life giving Sun light.
- Among other Important functions, Sunlight helps our skin manufacture Vitamin D, which is essential for normal bone formation
- Sunlight also helps to keep our sleeping patterns on track so we can stay awake during the day and sleep soundly at night
- Getting too little sun, specially in winter months can leave some people prone to a form of depression known as seasonal affective disorder
- The U.S. FDA recommends that Sun safety is always in season, and it’s important to protect your skin from sun damage throughout the year, no matter the weather. Why? Exposure to the sun can cause sunburn, skin aging (such as skin spots, wrinkles, or “leathery skin”), eye damage, and SKIN CANCER, the most common of all cancers.
|
Damaging Effects Of Sun Rays
-
Follow the "ICON's LINK" Above to learn and Enjoy Scientific facts about UV Radiation
- Sunlight is the main source of UV rays
- Tanning lamps and beds are also sources of UV rays
- Even though UV rays make up only 10% of the Sun's rays, they are The Main Cause of the sun's damaging effects on the SKIN and EYES
- UV damage the DNA of skin cells. Skin Cancers start when this damage affects the DNA of genes that control skin cell growth
|
What to Know About Skin Cancer
|
Most Up-To-Date Authorities's Recommendations to Protect From UV Rays
-
Follow the "ICON's LINK" Above to learn the most up to date recommendations, based on Scientific facts, about How To Protect From The Damaging UV Rays
|