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Solar prominence (25) |
Metallic prominence (6) |
Kodaikanal Observatory (5) |
Solar spectrum (5) |
Sun (5) |
Absorption Markings: Hα (2) |
Spectroheliograms (2) |
Spectrum (2) |
Sun`s limb (2) |
Astronomical work (1) |
Now showing items 1-10 of 49