Mars (late 19th century)
Meteor rocks (1898)
Moon & solar eclipse (1898)
Solar system & theory of the seasons (c. 1900)
Solarstorm & solar eclipse (1898)
A Partial Lunar Eclipse (1898)
Nebulae in different forms (1898)
Jupiter and Saturn (1898)
Heliometer (1898)
Strassbourg Observatory telescope (1898)
Observatory at Pulkowa near St. Petersburg (1898)
Lick observatory, California (1898)
Strassbourg Observatory (1898)
Saturn & Jupiter (1868)
Moon Craters - Mädler, Lohrmann, Schmidt (1868)
Bright Comets with tails (1898)
Spiral Nebulae after Lassell (1898)
Orion Nebula (1898)
Comets (1898)
Landscape with a large comet (1898)
Northern & Southern Nebulae (1868)
Solar storms (1885)
Brorsen's & Encke's Comet (1868)
Milkyway (1885)
