He returned to politics to oppose the pro-slavery Kansas – Nebraska Act ( 1854 ); this law repealed the slavery-restricting Missouri Compromise ( 1820 ).

Percy Bysshe Shelley composed a " Hymn of Apollo " ( 1820 ), and the god's instruction of the Muses formed the subject of Igor Stravinsky's Apollon musagète ( 1927 – 1928 ).

Causes include controversy over admitting Missouri as a slave state in 1820, the acquisition of Texas as a slave state in 1845 and the status of slavery in western territories won as a result of the Mexican – American War and the resulting Compromise of 1850.

* 1820 – Nadar, French photographer, caricaturist, journalist, novelist and balloonist ( d. 1910 )

* 1820 – Alexander Ypsilantis is declared leader of Filiki Eteria, a secret organization to overthrow Ottoman rule over Greece.

* 1820 – George Grove, English historian ( d. 1900 )

* 1820 – John Tyndall, British physicist ( d. 1893 )

* 1890 – David Wilber, American politician ( b. 1820 )

* 1751 – Wilhelmina of Prussia, Princess of Orange ( d. 1820 )

* 1820 – Andrew Rainsford Wetmore, Canadian politician ( d. 1892 )

* 1820 – Constitutionalist insurrection at Oporto, Portugal.

* Alfonso Sanz y Martínez de Arizala ( 28 January 1880, Madrid – 1970 ), married in 1922 to María de Guadalupe de Limantour y Mariscal ( d. 1977, Marbella ), daughter of Julio de Limantour y Marquet ( 17 June 1863, Mexico City – 11 October 1909, Mexico City ) and wife Elena Mariscal y ..., paternal granddaughter of French Joseph Yves de Limantour y Rence de la Pagame ( 1812, Ploemeur – 1885, Mexico City ) and wife Adèle Marquet y Cabannes ( 1820, Bordeaux –?

* 1771 – Karl Philipp Fürst zu Schwarzenberg, Austrian field marshal ( d. 1820 )

* 1820 – Alexander Cartwright, American inventor of Baseball ( d. 1892 )

Anne Brontë (; 17 January 1820 – 28 May 1849 ) was a British novelist and poet, the youngest member of the Brontë literary family.

Four more children followed: Charlotte, ( 1816 – 1855 ), Patrick Branwell ( 1817 – 1848 ), Emily, ( 1818 – 1848 ) and Anne ( 1820 – 1849 ).

* 1899 – Joseph Wolf, German artist ( b. 1820 )

* Daniel Boone ( November 2, 1734 October 22 – September 26, 1820 ) was an American pioneer, explorer, and frontiersman whose frontier exploits made him one of the first folk heroes of the United States.

* 1820 – The Venus de Milo is discovered on the Aegean island of Melos.

The Russian abacus was brought to France around 1820 by the mathematician Jean-Victor Poncelet, who served in Napoleon's army and had been a prisoner of war in Russia.

Although myths and speculation about a Terra Australis (" Southern Land ") date back to antiquity, the first confirmed sighting of the continent of Antarctica is commonly accepted to have occurred in 1820 by the Russian expedition of Fabian Gottlieb von Bellingshausen and Mikhail Lazarev on Vostok and Mirny.

* 1820 – Afanasy Fet, Russian poet ( d. 1892 )

The islands were named after the first in the Russian ( Krusenstern ) and French ( Duperrey ) maps ( 1820 ), later in the English maps.

In 1820 a Russian expedition discovered the continent of Antarctica.

* January 28, 1820 – A Russian expedition led by Fabian Gottlieb von Bellingshausen and Mikhail Petrovich Lazarev approaches the Antarctic coast ( see History of Antarctica ).

In 1820, several expeditions claimed to have been the first to have sighted Antarctica, with the very first being the Russian expedition led by Fabian Gottlieb von Bellingshausen and Mikhail Lazarev.

In 1820 the Russian explorer Mikhail Lazarev visited Nukufetau as commander of the Mirny.

* Mikhail Lyapunov ( 1820 – 1868 ), Russian astronomer

The islands were named the Gilbert Islands in 1820 by a Russian admiral, Johann von Krusenstern, and French captain Louis Duperrey, after a British captain, Thomas Gilbert, who crossed the archipelago in 1788.

Chukotka remained mostly outside the control of the Russian Empire and consequently other foreign powers ( American, British, Norwegian ) began to hunt and trade in the area from about 1820 onwards.

Such a colony was searched for by many Russian expeditions launched by the Russian-American Company from 1818 on and during the early 1820 ’ s.

The island was formally named South Borodino Island after being discovered by the Russian marine vessel Borodino in 1820.

Between 1820 and 1846, the Russian Empire allocated land to the Gagauz and gave them financial incentives to settle in Bessarabia in the settlements vacated by the Nogai tribes.

* after approximately 1820: Behrenstraße 66 ( now the rear part of offices belonging to the Russian embassy )

Unknown to Bransfield, two days earlier, 28 January 1820, the Russian explorer Fabian Gottlieb von Bellingshausen may have caught sight of an icy shoreline now known to have been part of East Antarctica.

* Ivan Lazarev – ( 1820 – 1887 ) general in the Russian Army during the Russo-Turkish War, 1877 – 1878.

The island was first sighted in 1820 by the Russian explorer Fabian Gottlieb von Bellingshausen, who named the island for his ship Vostok ( the name means " East " in Russian ).

The island was first sighted in 1820 by the Russian explorer Fabian Gottlieb von Bellingshausen, who named the island for his ship Vostok ( the name means " East " in Russian ).

He was appointed in 1820 to command the Kolymskaya expedition to explore the Russian polar seas.

It was not till 1820 that his territory was occupied by Russian troops ; the Khan fled to Persia and Shemakha was incorporated in Russian territory.

In 1820, an expedition intended for the colonies ( which, at the time, were on the verge of being lost themselves, to rebels and the Monroe Doctrine ) revolted in Cadiz.

In 1819 – 1820, Johann Baptist von Spix and Carl Friedrich Philipp von Martius were engaged in an expedition to Brazil, and on their return to Europe, amongst other collections of natural objects they brought home an important set of the fresh water fish of Brazil, and especially of the Amazon River.

It is certain that on 28 January 1820 ( New Style ), the expedition led by Fabian von Bellingshausen and Mikhail Petrovich Lazarev on two ships reached a point within 20 miles ( 40 km ) of the Antarctic mainland and saw ice-fields there.

The first Anglo-American expedition to come through the county was led by Stephen H. Long who mistook the Canadian River for the Red River, in August 1820.

Governor Lewis B. Cass led an expedition through the area in 1820.

Schoolcraft was a key member of the 1820 Cass Expedition, organized by territorial governor Lewis Cass to explore the Michigan Territory ; the expedition played an important role in encouraging settlement of the territory.

During this expedition, which lasted from May 1819 to November 1820, Sabine noted that changes in magnetic intensity had taken place since his previous visit.

In 1820 – 1825, on a scientific expedition to the Middle East with his friend Wilhelm Hemprich, he collected thousands of specimens of plants and animals.

He had been part of a previous expedition in 1820 led by General Lewis Cass that had named nearby Cass Lake ( which is downstream from Itasca ) as the source of the river.

The genus is named for Edwin James, the botanist for Stephen Long's expedition that explored the territory between the Platte and Arkansas Rivers in 1820.

In 1820, he led an expedition to the northern part of the territory, in the northern Great Lakes region in present-day northern Minnesota, in order to map the region and discover the source of the Mississippi River.

" When Stephen Long led an expedition to the area in 1820, he labeled the area on his map as the " Great American Desert.

Roe's next voyage, the King expedition of 1820, was again intended to survey along the north coast, but they ran into violent weather almost as soon as they left Sydney.

Other notable explorations included the Pike expedition of 1806 – 07 by Zebulon Pike, the journey along the north bank of the Platte River in 1820 by Stephen H. Long to what came to be called Longs Peak, the John C. Frémont expedition in 1845 – 46, and the Powell Geographic Expedition of 1869 by John Wesley Powell.

He first sent an expedition westward ( Feb. 1820 ) which conquered and annexed the Siwa oasis.

Beginning in the spring of 1820, Schoolcraft served as a geologist on the Lewis Cass expedition.

Arriving a month earlier than the 1820 expedition, he was able to take advantage of higher water to navigate to Lake Itasca.

During this expedition Bellingshausen and Lazarev became the first explorers to see the land of Antarctica on January 28, 1820 ( New Style ).

Leaving Portsmouth on 5 September 1819 the expedition crossed the Antarctic Circle ( the first to do so since Cook ) on 26 January 1820.