The document describes the different layers of the Sun from the photosphere to the corona. The photosphere is the deepest layer at 250 miles thick and ranges from 6500K to 4000K in temperature. Above is the chromosphere ranging from 250 to 1300 miles and 4000K to 8000K. The narrow transition region between the chromosphere and corona ranges from 8000K to 500,000K. The outer corona extends 1300 miles and reaches temperatures over 500,000K. Various solar phenomena like granules, faculae, sunspots, auroras, and prominences are also mentioned.

2. PHOTOSPHERE
• Deepest layer of the Sun.
• 250 miles (400 km).
• 6500 K at the bottom and
4000 K at the top (6200
and 3700 degrees C).
• Covered with granulation.

3. CHROMOSPHERE
• 250 miles (400 km) and
1300 miles (2100 km)
• Above the photosphere
• 4000 K at the bottom
and 8000 K at the top
(3700 and 7700 degrees
C)

4. TRANSITION REGION
• Very narrow (60 miles / 100
km)
• Between the chromosphere
and the corona
• About 8000 to about
500,000 K (14,000 to
900,000 degrees F, 7700 to
500,000 degrees C).

5. CORONA
• Outermost layer of the Sun,
• 1300 miles (2100 km) above
the photosphere.
• 500,000 K (500,000 degrees C)
or more, up to a few million K.
• The corona cannot be seen
with the naked eye except
during a total solar eclipse.

7. PHENOMENON
• Granules

8. PHENOMENON
• Faculae

9. PHENOMENON
• Sunspot

10. PHENOMENON
• Aurora

12. PHENOMENON
• Prominences