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za mai 2004 goda.
Serenitatis Diameter Sequence
1.05.2004 | Lunnoe foto dnya
Have you heard of the North Polar Sequence? It is a series of 96 stars near Polaris whose brightnesses and colors were accurately determined as standards for stellar astronomers. There has not been a comparable standard sequence that would permit lunar observers to judge their observing conditions, telescopic performance, visual acuity or imaging limits.