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Sun Spots and the Corona

Sun Spots
Sun Spots are cooler patches on the sun's surface that appear darker, lasting anywhere from about 2 weeks or sometimes even monthes. Sun spots often appear in groups. Sun spots are caused by magnetic disturbances. Sun spots' darkness is due to their very low temperatures (about 2,700 degrees Fahrenheit, or 1,500 degrees Celsius) compared to the rest of the photoshpere's temperature.
 
The Corona
The Corona is the outer layer of the sun. Temperatures in the Corona are a VERY hot 1 million degrees celsius. This is the very thin part of the atmosphere. The Corona can only be seen during total eclipses of the sun. This is the region where promineces appear. Promineces are an arc of gas that erupts from the surface of the sun. The Corona's outer edges, the promineces fade out into a sea of very charged particles that then flow into space as the solar wind. Solar winds are streams of ions that are given off by magnetic anomalies on the sun.