Discovery of Pluto

Pluto is a dwarf planet in the Kuiper belt, a ring of bodies beyond the orbit of Neptune. It is the ninth-largest and tenth-most-massive known object to directly orbit the Sun. It is the largest known trans-Neptunian object by volume by a small margin, but is less massive than Eris.

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

Which happened first?

• Discovery of Pluto happened 5 years after Discovery of rhenium
• Discovery of Pluto happened 7 years before Discovery of technetium
• Discovery of Pluto happened 8 years after Discovery of hafnium
• Discovery of Pluto happened 9 years before Discovery of francium
• Discovery of Pluto happened 10 years before Discovery of neptunium

Timeline

1. Discovery of hafnium1922
2. Discovery of rhenium1925
3. Discovery of Pluto (this page)February 18, 1930
4. Discovery of technetium1937
5. Discovery of francium1939
6. Discovery of neptunium1940

Related

• Discovery of hydrogen1766
• Discovery of oxygen1774
• Discovery of carbon1789
• Discovery of aluminium1825
• Discovery of heliumAugust 18, 1868
• Discovery of nitrogen1772
• Discovery of sulfur1777
• Discovery of lithium1817