Today in 1822 Sir William Herschel passed to his reward. He is most remembered for his discovery of the planet Uranus—although Frances Rolleston felt the credit was due to his sister Caroline. See my earlier blog discoverer-of-the-planet-uranus.html.
We think of Herschel as a great astronomer (and he was), but it surprises us to learn how little was known about the solar system 150 years ago. The sun was even thought to be inhabited. Solar spots were admitted to be openings in the luminous stratum, not opaque scoriae floating on its surface.
Sir William Herschel’s study of sunspots led him to suggest that the light of the sun issues from an outer stratum of self-luminous material, beneath which is a second stratum of clouds of inferior brightness, designed to protect the solid body of the sun, and its inhabitants, from the intense heat and brilliancy surrounding them.
We may be amused at how little was known in Herschel's day of the visible world, but some day others may amuse themselves at our ignorance. And what about the unseen world?
Some of the above is found in the chapter "Astronomy" in Frances Rolleston: British Lady, Scholar and Writer of Mazzaroth.