On This Day
2003 - Eris (dwarf planet)
Images of the dwarf planet Eris are taken and subsequently used in documenting its discovery.<ref name="Brown-AJ2005-635">
#On This Day
On This Day
On This Day
1805 - Battle of Trafalgar
Napoleonic Wars: A British fleet led by Lord Nelson defeats a combined French and Spanish fleet under Admiral Villeneuve in the Battle of Trafalgar.
On This Day
1600 - Battle of Sekigahara
Tokugawa Ieyasu defeats the leaders of rival Japanese clans in the Battle of Sekigahara and becomes shōgun of Japan.
On This Day
2018 - Mercury (planet)
The BepiColombo spacecraft is launched on an Ariane 5 rocket to study Mercury.
On This Day
1935 - Long March
The Long March, a mammoth retreat undertaken by the armed forces of the Chinese Communist Party a year prior, ends.
On This Day
1803 - Louisiana Purchase
The United States Senate ratifies the Louisiana Purchase.
On This Day
2005 - Saddam Hussein
Saddam Hussein goes on trial in Baghdad for crimes against humanity.
On This Day
1900 - Planck's law
Max Planck discovers Planck's law of black-body radiation.
On This Day
1781 - Siege of Yorktown
American Revolutionary War: The siege of Yorktown comes to an end with the British surrender.
On This Day
1967 - Venus
The Soviet probe Venera 4 reaches Venus and becomes the first spacecraft to measure the atmosphere of another planet.
On This Day
1867 - Russian Empire
United States takes possession of Alaska after purchasing it from Russia for $7.2 million. Celebrated annually in the state as Alaska Day.
On This Day
1565 - Battle of Fukuda Bay
Ships belonging to the Matsura clan of Japan fail to capture the Portuguese trading carrack in the Battle of Fukuda Bay, the first recorded naval battle between Japan and the West.