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![De prodigiosa specie, naturaq[ue] cometae, qui nobis effulsit altior lunae sedibus, insolita prorsus figura, ac magnitudine, anno 1577 plus septimanis 10. apodeixis tum physica tum mathematica : adiuncta his explicatio duorum chasmaton anni 1575 nec non ex cometarum plurium phaenomenis epilogistica quaedam assertio de communi illorum natura, generationum causis atque decretis supra quam hactenus à Peripateticis annotatum est](/_next/image?url=https%3A%2F%2Fwww.e-rara.ch%2Fi3f%2Fv21%2F126429%2Ffull%2F200%2C%2F0%2Fdefault.jpg&w=3840&q=75)
De prodigiosa specie, naturaq[ue] cometae, qui nobis effulsit altior lunae sedibus, insolita prorsus figura, ac magnitudine, anno 1577 plus septimanis 10. apodeixis tum physica tum mathematica : adiuncta his explicatio duorum chasmaton anni 1575 nec non ex cometarum plurium phaenomenis epilogistica quaedam assertio de communi illorum natura, generationum causis atque decretis supra quam hactenus à Peripateticis annotatum est
When a brilliant comet slashed across the 1577 sky, Cornelius Gemma did not just track its orbit. He diagnosed the moral fever of the Belgian state and turned his telescope into a mirror for a decaying empire.