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| Evolution (development) (1) |
| Faculae (1) |
| Fine structure (1) |
| H alpha line (1) |
| Magnetic field configurations (1) |
| Solar corona (1) |
| Solar physics (1) |
| Solar prominences (1) |
| Spectroheliographs (1) |
| Sunspots (1) |
Now showing items 1-10 of 1