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Washing mirrors
Dust accumulates over time on mirrors´ surfaces, absorbing and diffusing some of the light that should be focused on the instruments, so periodical cleaning is needed.
Kredit:ESO
O snímku
| Id: | faut-pas-rever021 |
| Typ: | Fotografický |
| Datum zveřejnění: | 26. dubna 2013 15:56 |
| Velikost: | 2304 x 3072 px |
