... predicted around 1850 that solar systems evolve from gasseous nebulae? Stardust, if you like. Ehh, but you never read it?? A remarkable accomplishment, considering that he died in 1804. He wrote it one hundred years earlier, around 1750 (more precise: at 1755) "General Natural History and Theory of the Heavens" http://www.mala.bc.ca/~johnstoi/kant/kant2e.htm JH