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proper motion
| of
| sunspots
| proper motion | |
| gen. | mouvement propre |
| of... | |
| gen. | en date du.. |
| sunspot | |
| nat.sc. | tache solaire |
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| mouvement propre | |||
| English thesaurus | |||
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| PM | |||
| proper motion: 7 phrases in 2 subjects |
| Astronomy | 6 |
| Natural sciences | 1 |