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7
7.1
4
7.2
4
1.
2.
3.
4.
1. Inner planets
2. asteroid belt
3. outer planets
4. Oort’scloud
Meteoroid
Kuiper belt object
Eris
7.3
G2 5,800
109
2
3
1. Core 15
2. radiation zone
3. convection zone
3
1. photosphere
5,800
2. chromosphere
25,000
3. corona
Solar wind200-900
solar flare
solar storms