2003 astronomers discover sedna a distant trans neptunian dwarf 11 14
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2003 23 years ago Historical Events November 14 2 sources

Astronomers discover Sedna, a distant trans-Neptunian dwarf planet.

On November 14, in the year 2003, Astronomers discover Sedna, a distant trans-Neptunian dwarf planet. This event is recorded as a Historical Events event in the history of November 14, a notable event in this corner of history.

Sedna is a dwarf planet in the outermost reaches of the Solar System, orbiting the Sun far beyond the orbit of Neptune. It was discovered in 2003, and is roughly 1,000 km in diameter. Spectroscopic analysis has revealed its surface to be a mixture of the solid ices of water, carbon dioxide, and ethane, along with sedimentary deposits of methane-derived, reddish-colored tholins, a chemical makeup similar to the surfaces of other trans-Neptunian objects. Sedna is not expected to have a substantial atmosphere. Within the range of uncertainty, it is tied with Ceres in the asteroid belt as the largest dwarf planet not known to have a moon. Owing to its lack of known moons, Sedna's mass and density remain unknown.

Key Facts

  • This event took place on November 14, 2003 (AD era).
  • It is categorised as a Historical Events event in recorded history.
  • Referenced in 2 Wikipedia articles.
  • Wikipedia source last updated on 26 October 2026.

On This Date in History

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Notable Deaths 2015 Nov 14 Nick Bockwinkel, American professional wrestler (born 1934)
Notable Deaths 2015 Nov 14 K. S. Gopalakrishnan, Indian director, producer, and screenwriter (born 1929)
Notable Deaths 2015 Nov 14 Warren Mitchell, English actor and screenwriter (born 1926)
Notable Deaths 2014 Nov 14 Eugene Dynkin, Russian-American mathematician and theorist (born 1924)
Notable Deaths 2014 Nov 14 Glen A. Larson, American director, producer, and screenwriter, created Battlestar Galactica (born 1937)
Notable Deaths 2014 Nov 14 Morteza Pashaei, Iranian singer-songwriter (born 1984)
Notable Deaths 2013 Nov 14 Sudhir Bhat, Indian producer and manager (born 1951)
Notable Deaths 2013 Nov 14 Hari Krishna Devsare, Indian journalist and author (born 1938)
Notable Deaths 2013 Nov 14 Bennett Masinga, South African footballer (born 1965)
Historical Events 2012 Nov 14 Israel launches a major military operation in the Gaza Strip in response to an escalation of rocket attacks by Hamas.
Notable Deaths 2012 Nov 14 Alexandro Alves do Nascimento, Brazilian footballer (born 1974)
Notable Deaths 2012 Nov 14 Brian Davies, Australian rugby player and manager (born 1930)
Notable Deaths 2012 Nov 14 Martin Fay, Irish fiddler (born 1936)
Notable Deaths 2012 Nov 14 Ahmed Jabari, Palestinian commander (born 1960)
Notable Deaths 2012 Nov 14 Abubakar Olusola Saraki, Nigerian physician and politician (born 1933)
Notable Deaths 2011 Nov 14 Esin Afşar, Italian-Turkish singer and actress (born 1936)
Notable Deaths 2011 Nov 14 Neil Heywood, English-Chinese businessman (born 1970)
Notable Deaths 2011 Nov 14 Jackie Leven, Scottish singer-songwriter and guitarist (born 1950)
Notable Deaths 2010 Nov 14 Wes Santee, American runner (born 1932)
Selected Events 2010 Nov 14 Red Bull Racing's Sebastian Vettel won the Drivers' Championship after winning the final race of the season, becoming…
Historical Events 2008 Nov 14 The first G-20 economic summit opens in Washington, D.C.
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Notable Deaths 2008 Nov 14 Kristin Hunter, American author and academic (born 1931)
Notable Deaths 2008 Nov 14 Robert E. Valett, American psychologist, teacher, and author (born 1927)
Notable Deaths 2006 Nov 14 Sumner Shapiro, American admiral (born 1926)
Notable Deaths 2004 Nov 14 Michel Colombier, French-American composer and conductor (born 1939)
Notable Deaths 2003 Nov 14 Gene Anthony Ray, American actor, singer, dancer, and choreographer (born 1962)
Selected Events 2003 Nov 14 Astronomers Michael E. Brown, Chad Trujillo, and David L. Rabinowitz discovered the trans-Neptunian object Sedna.
Notable Deaths 2002 Nov 14 Eddie Bracken, American actor (born 1915)
Notable Deaths 2002 Nov 14 Elena Nikolaidi, Greek-American soprano and educator (born 1909)
Historical Events 2001 Nov 14 War in Afghanistan: Afghan Northern Alliance fighters take over the capital Kabul.
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Notable Deaths 2001 Nov 14 Charlotte Coleman, English actress (born 1968)
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Notable Births 1997 Nov 14 Noussair Mazraoui, Moroccan footballer
Notable Births 1997 Nov 14 Christopher Nkunku, French footballer
Notable Births 1997 Nov 14 Axel Tuanzebe, English-Congolese footballer
Notable Deaths 1997 Nov 14 Eddie Arcaro, American jockey and sportscaster (born 1916)

This article draws on content from Wikipedia, available under CC BY-SA 4.0.

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