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| Picture No | 10007682 |
| Date | 1922 |
| Description | Explosions on the surface of the Sun |
| Details |
Could explosions on the surface of the Sun explain the variations in summer temperature Earth has been experiencing? These explosions of energy are known as solar flares, or solar storms, first observed by scientists in the 1850s. They vary in frequency, within an 11-year cycle.
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| Source | Bolson in Allers-Familj Journal (Stockholm) 22 March 1922 |
| Credit | Mary Evans Picture Library |
| Restrictions |
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