Okay, so E.L. Truvelout didn’t just create beautiful, astronomical illustrations (like the ones on view now in “Radiant Beauty”) - he ALSO published this manual filled with scientific observations for each celestial subject. Here are his notes on The Planet Jupiter, observed on Nov. 1, 1880, at 9:30 p.m.
key passage:
“Two of Jupiter’s four moons present bright disks near the planet’s western limb, and cast their shadows far eastward on the disk, that of the “second satellite” falling upon the Red Spot. On the Red Spot are seen in addition two small black spots, no explanation of which can yet be offered.”
....WE HAVE AN EXPLANATION YOU GUYS
images:
E. L. Trouvelot (1827–1895), observations notes on The Planet Jupiter from The Trouvelot Astronomical Drawings Manual, published in 1882 as a companion to his series of astronomical lithographs.
E. L. Trouvelot (1827–1895), The Planet Jupiter (details), 1881, color lithograph, 25 ¾ × 32 ¾ in. Jay T. Last Collection, The Huntington Library, Art Collections, and Botanical Gardens. Gif’d by The Huntington.