Io is the innermost of the four Galilean moons of Jupiter. It is named after the Greek mythological figure Io. Although the name "Io" was suggested by Simon Marius soon after its discovery, this name and the names of the other Galilean satellites fell into disfavor for a considerable time, and were not revived in common use until the mid-20th century. In much of the earlier astronomical literature, Io is simply referred to by its Roman numeral designation as "Jupiter I," or simply as "the first satellite of Jupiter."
Read the rest of this article: http://en.wikipedia.org/wiki/Io_%28moon%29
Today's selected anniversaries:
1446 King Sejong the Great of Joseon and various Korean linguists published the Hunmin Jeongeum to introduce their invention — the Hangul alphabet. (http://en.wikipedia.org/wiki/Hangul)
1701 The Collegiate School of Connecticut (later renamed Yale University) was chartered in Old Saybrook, Connecticut. (http://en.wikipedia.org/wiki/Yale_University)
1888 The Washington Monument, then the world's tallest building, officially opened to the general public. (http://en.wikipedia.org/wiki/Washington_Monument)
1919 Black Sox scandal: The Cincinnati Reds "defeated" the Chicago White Sox to "win" the World Series major league baseball championship by 5 games to 3. (http://en.wikipedia.org/wiki/Black_Sox_scandal)
1963 A landslide displaced large amounts of water from the Vajont Dam in Italy, causing waves and floods that quickly swept away several villages, killing almost 2,000 people. (http://en.wikipedia.org/wiki/Vajont_Dam)
Wikiquote of the day:
"No one is useless in this world who lightens the burden of it for anyone else." ~ Charles Dickens in Our Mutual Friend (http://en.wikiquote.org/wiki/Charles_Dickens)