A New Planet in the Sky: Neptune’s Discovery in 1846
The Birth of Modern Astronomy On September 23, 1846, German astronomer Johann Gottfried Galle became the first person to observe the planet Neptune, an extraordinary achievement that revolutionized the field of astronomy. This discovery was particularly significant because Neptune’s existence had been mathematically predicted before it was ever seen through a telescope. French mathematician Urbain […]
Smithsonian Institution Created
On August 10, 1846, the Smithsonian Institution was established by an act of the United States Congress. The creation of this esteemed institution was made possible by the bequest of James Smithson, a British scientist who left his fortune to the United States for the purpose of founding an establishment dedicated to the increase and […]
U.S. Takes San Francisco from Mexico
As part of the broader conflict of the Mexican-American War, the United States took control of San Francisco from Mexico on July 9, 1846. This military action was significant in the U.S. expansionist policy known as Manifest Destiny, which aimed at extending its territory across the North American continent. The capture of San Francisco opened […]
U.S. Congress Declares War on Mexico
On May 13, 1846, the U.S. Congress officially declared war on Mexico, initiating the U.S.-Mexican War. This conflict stemmed from the annexation of Texas and the disputes over its border, as well as American desires to acquire lands in what are now California, Nevada, Utah, Arizona, New Mexico, and Colorado. The war significantly altered the […]
Iowa Becomes the 29th U.S. State
A new star joined the constellation of states on December 28th, 1846, as Iowa was admitted to the Union. Known for its agricultural contributions, Iowa became the 29th state of the United States.
Neptune
The planet Neptune was discovered by German astronomer Johann Gottfried Galle on September 23rd, expanding our understanding of the solar system.