The sidereal messenger of Galileo Galilei : and a part of the preface to Kepler's Dioptrics containing the original account of Galileo's astronomical discoveries (1880)
Galilei, Galileo, 1564-1642, Kepler, Johannes, 1571-1630, Carlos, Edward Stafford · London : Rivingtons · leaf 38
mall spots just mentionedhave this common characteristic always and in everycase, that they have the dark part towards the Sunsposition, and on the side away from the Sun theyhave brighter boundaries, as if they were crownedwith shining summits. Now we have an appearancequite similar on the Earth… … the shape of a lunar mountain and of a walled plain. Galileo: Sidereua Nundus, Venice 1610. THE SIDEREAL MESSENGER. 17 beams; and just as the shadows in the hollows of theEarth diminish in size as the Sun rises higher, soalso these spots on the Moon lose their blackness as theilluminated part grows…
Astronomy
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![An illustration from Divina proportione : opera a tutti glingegni perspicaci e curiosi necessaria oue ciascun studioso di philosophia: prospettiua pictura sculptura: architectura: musica: e altre mathematice: suavissima: sotile: e admirabile doctrina consequira: e delecterassi: co[n] varie questione de secretissima scientia (1509)](https://img.insideoutlibrary.com/img/200/ia-divinaproportion00paci-308-467.webp)
