1. The Sun is the center of our solar system and is the basis for
all life here on Earth.
2. The Sun is 109 times the size of Earth, and 400 times the size
of the Moon.
3. The diameter of the Sun is 866,000 miles.
4. The average distance the Sun is from earth is 92,957,000 miles.
5. The Sun is closest to the Earth (aphelion) on or about January
3rd., when it is 91,402,000 miles away.
6. The Sun is farthest from Earth on or about July 4th., when it
is 94,512,000 miles away.
"Electromagnetic Radiation"
1. The Sum emits all forms of radiation in short waves.
2. These short waves are call: "Electromagnetic Radiation".
3. Electro because they contain radiation with electrical properties.
4. Magnetic because they contain radiation with magnetic properties.
5. Radiation from the Sun travels at the speed of light. 186,000
miles per second through a vacuum (Space) and takes approximately
eight minutes to reach the Earth.
"Insolation"
1. Radiation from the sun that the Earth receives is call: "Insolation"
2. "Sol" being Latin for Sun. About 45% is visible light. 46% infrared.
9% ultraviolet radiation.
"The Sun's Movements"
1. The Sun has two movements.
2. The Sun moves along through what seems to be endless space along
with all the other stars, planets, etc that make up the solar system
at the speed of 43,000 mph or about 12 miles per second.
3. The Sun rotates which takes about 25 to 28 days.
4. Because the Sun is made up of gas, parts of it spin around less
than others.
5. The equator turns the slowest.
6. The Sun is almost a perfect disc.
7. The color of the Sun is "White"
"Black Body"
1. The Sun is what is called a "Black Body" meaning the Sun absorbs
all radiation at every wavelength and emits all radiation at
every wavelength.
2. The Earth is also called a "Black Body" for the same reason.
3. A "Black Body" (Sun & Earth) is referred to a perfect absorber
and a perfect emitter.
"Weather By Giannetta"
....Back to index page.