- Surface (photosphere) temperature – 10,000 °F (5,500 °C).
- Photosphere – first layer of solar atmosphere – 250 miles thick.
- Sun’s Core – 27 million °F or 15 million °C
- Corona/outer atmosphere – gets hotter as distance from Sun’s surface grows.
- Corona’s temperature can go up to 3.5 million °F (2 million °C)