Which Happened First?

Discovery of Gonggong (dwarf planet)

Discovery of Gonggong (dwarf planet)
Image: NASA, STSci, Wesley Fraser, Gábor Marton et al. · Public domain · source

Gonggong is a dwarf planet and a member of the scattered disc beyond Neptune. It has a highly eccentric and inclined orbit during which it ranges from 33–101 astronomical units from the Sun. As of 2026, its distance from the Sun is 89.7 AU, and it is the sixth-farthest known Solar System object.

Summary from Wikipedia (CC BY-SA 4.0) · Dates from Wikidata (CC0)

Which happened first?

Timeline

  1. Discovery of moscoviumAugust 2003
  2. Discovery of SednaNovember 14, 2003
  3. Discovery of 120347 SalaciaSeptember 22, 2004
  4. Discovery of OrcusFebruary 17, 2004
  5. Discovery of nihonium2006
  6. Discovery of Gonggong (dwarf planet) (this page)July 17, 2007

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