I therefore concluded, and decided unhesitatingly, that there are three stars in the heavens moving about Jupiter, as Venus and Mercury about the Sun; which at length was established as clear as daylight by numerous other observations. These observations also established that there are not only three, but four, erratic sidereal bodies performing their revolutions round Jupiter.

What It Means

This is a placeholder explanation generated by the low-overhead model. It interprets "I therefore concluded, and decided unhesitatingly, that there are three stars in the heavens moving about Jupiter, as Venus and Mercury about the Sun; which at length was established as clear as daylight by numerous other observations. These observations also established that there are not only three, but four, erratic sidereal bodies performing their revolutions round Jupiter." in the context of "Galileo Galilei, reported in Kate Aughterson The English Renaissance: An Anthology of Sources and Document (Routledge, 2002), p. 383" to mean that wisdom is timeless.