examined the evidence extensively and ruled in favor of Marius's independent discoveries, with results published by Johannes Bosscha in 1907. Marius had discovered the moons independently but had not noted it until 29 December 1609. Marius used the Julian calendar, and that date is equivalent to 8 January 1610, in the Gregorian one used by Galileo, one day after Galileo's letter in which he first described the moons.

Regardless