Historical eventNovember 142003

Sedna (dwarf planet)

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

In context

When
Friday, November 14 200323 years ago
Category
Historical eventA dated happening — a battle, treaty, launch, discovery, disaster or decision — recorded on this calendar day.
Era
21st century · 2000s
Recorded from
Wikipedia “On this day” feed

At a glance

Dates: From 2003.

What happened

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

November 14 through the years

Other entries on the same calendar day, in order.

  1. 2001War in Afghanistan (2001–2021)
  2. 20012001 Kunlun earthquake
  3. 2003Michael E. Brown
  4. 2003Sedna (dwarf planet)
  5. 20082008 G20 Washington summit
  6. 2008Space Shuttle Endeavour
  7. 2010Red Bull Racing
  8. 2012Israel
  9. 20162016 Kaikōura earthquake
  10. 2017Rancho Tehama shootings
  11. 2019Saugus High School shooting

Also in 2003

  • September 12Typhoon MaemiTyphoon Maemi, the strongest recorded typhoon to strike South Korea, made landfall near Busan.
  • September 12Steam (service)The first public release of Steam, a distribution service for computer games, was made available for download.
  • September 12United NationsThe United Nations lifts sanctions against Libya after that country agreed to accept responsibility and recompense the families of victim…
  • September 12Iraq WarIraq War: In Fallujah, U.S. forces mistakenly shoot and kill eight Iraqi police officers.
  • September 14Kumba YalaPresident Kumba Ialá (pictured) of Guinea-Bissau was deposed in a bloodless military coup.
  • September 142003 Estonian European Union membership referendumIn a referendum, Estonia approves joining the European Union.
  • November 17Arnold SchwarzeneggerActor Arnold Schwarzenegger's tenure as the governor of California begins.
  • October 20Sloan Great WallThe Sloan Great Wall, once the largest cosmic structures known to humanity, is discovered by students at Princeton University.

Everything we record for 2003 →

Sources

Cite this page

“Sedna (dwarf planet)”, What's On This Date, https://whatsonthisdate.com/app/event/sedna-dwarf-planet-2003-november-14, accessed October 27, 2026.

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Questions about this entry

When did Sedna (dwarf planet) happen?

November 14 2003 — 23 years ago, on a Friday.

Where does this text come from?

Wikipedia “On this day” feed. Summaries are short adaptations that link back to the source, not reprints.

How do I cite this page?

Use the ready-made citation near the sources at the bottom of the page, and follow the source link to cite the underlying record as well.

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