Abstract

HISTORY HAS IT that the four bright satellites of Jupiter were discovered independently by Galileo and the German astronomer Simon Mayer in the early seventeenth century. These initial glimpses of what we now call the Galilean moons of Jupiter are among the first great revelations to have accrued from pointing the newly invented telescope toward the heavens. Yet, were these men the first to observe Jupiter’s satellites? There have been persistent reports, particularly in the nineteenth century, that these moons can be seen with the naked eye.