lunar eclipse "On the nature of eclipses" Extending into space umbra "On the nature of eclipses" eclipse lunar "On the nature of eclipses" mÄsÃÄnÃm zatmÄnÃ On the nature of Solar and Lunar eclipses eclipse lunar eclipse total del eclipse umbral shadow of the Moon ¤ë¹ total eclipse eclipse total eclipse "On the nature of eclipses" umbral shadow of the Moon shadow or umbra lunar eclipse umbral shadow of the Moon "On the nature of eclipses" lunar eclipse prostoru za ZemÃ se prostÃrÃ¡ total eclipse decreased brightness