The SunBy: Kate BarneyPer.2

The Core The core of the sun is considered to

extend from the center to around 20-25% of the solar radius.

It’s density is about 150 times the density of water.

The sun’s surface temperature is approximately 5,800,000 degrees

Only 0.8% of the energy generated in the sun comes from the CNO cycle

Sunlight Sunlight is Earth's primary source of energy. Sunlight at the top of earths atmosphere is

composed of about 50% infrared light, 40% visible light, and 10% ultraviolet light.

The atmosphere in particular filters out over 70% of solar ultraviolet.

The solar constant is equal to approximately 1,368 watts per square meter.

Distance from each planet Mercury- 3,031 miles Venus- 7,521 miles Earth- 7,926 miles Mars- 4,222 miles Jupiter- 88,729 miles Saturn- 74,600 miles Uranus- 32,600 miles Neptune- 30,200 miles Pluto(a dwarf planet)- 1,413 miles

Atmosphere The parts of the Sun above the photosphere are

referred to collectively as the solar atmosphere. The coolest layer of the Sun is a temperature

minimum region about 500 km above the photosphere, with a temperature of about 4,100 degrees.

Above the chromosphere, the temperature rises rapidly from around 20,000 in the upper chromosphere to coronal temperatures closer to 1,000,000.

About The Sun It’s mass is 1.989E30 kg. It is almost perfectly spherical. The sun consists of hot plasma

interwoven with magnetic fields. It formed around 4.6 billion years ago. It is the star at the center of the solar

system.