Galileo’s discovery of Jupiter’s four moons

During this month in 1610, Italian astronomer Galileo made the earthshaking discoveries that four moons revolve around Jupiter and that the telescope reveals many more stars than are visible to the naked eye. 1610. 

Two gunmen connected to al-Qaeda in the Arabian Peninsula, a Yemeni-based militant group, stormed the Paris offices of Charlie Hebdo and killed 12 people in retribution for the satirical magazine’s portrayals of the Prophet Muhammad; the attackers were later killed by police. 2015. 

John Kufuor was inaugurated as president of Ghana in that country’s first peaceful transition from one elected government to another. 2001. 

Vietnamese forces took control of Phnom Penh, Cambodia, ousting the Khmer Rouge and its leader, Pol Pot. 1979.