Francesco Sizzi

Francesco Sizzi, an Italian astronomer who lived during the 17th century, is credited with being the first to notice the annual movement of sunspots.

In 1611, he published a book, Dianoia astronomica, optica, physica, qua Syderei Nuncij rumor de quatuor planetis à Galilaeo Galilaeo mathematico celeberrimo recens perspicillì cuiusdam ope conspectis, vanus redditur.

Auctore Francisco Sitio Florentino, (in Latin; approximate translation of its title: "Discussion of astronomy, optics, physics, where a rumor in Sidereus Nuncius about four planets, something recently observed with a telescope by the very notable mathematician Galileo Galilei, is shown to be unfounded.

In the macrocosm, there are seven planets: two favorable (beneficas) ones, two unfavorable (maleficas) ones, two luminaries, and unique Mercury, erratic and indifferent (vagum & indifferens).

The Sun: gold, the Moon: silver, Venus: copper, Jupiter: tin, Mars: iron, Saturn: lead, and Mercury: quicksilver, to use a non-astrological name for that metal.