On January 25, 1077, Holy Roman Emperor Henry IV arrived at the gates of the fortress at Canossa in Emilia Romagna beyond the Alpes to declare atonement and to pledge for forgiveness from Pope Gregory VII, who had excommunicated Henry earlier from church. Henry's act of penance became known as the “Walk to Canossa” (German: Gang nach Canossa). It took wisdom, patience, and self-restraint. It was also a brilliant strategy because he basically forced the Pope to forgive him.
On November 20, 1889, American astronomer Edwin Hubble was born. He is best known for his role in establishing the field of extragalactic astronomy and is generally regarded as one of the most important observational cosmologists of the 20th century.
A. Ghumare, N. Patil, C. Holkar, and V. Badgujar. International Journal on Recent and Innovation Trends in Computing and Communication, 3 (1):
175--180(January 2015)