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Oldest Known Moons

Name the 20 moons known to humanity the longest.
Source: Nasa
Earth's Moon is not counted.
Quiz by
belor
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Last updated: May 23, 2024
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First submittedMay 23, 2024
Times taken94
Average score75.0%
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Year of discovery
Planet
Answer
1610
Jupiter
Callisto
1610
Jupiter
Europa
1610
Jupiter
Ganymede
1610
Jupiter
Io
1655
Saturn
Titan
1671
Saturn
Iapetus
1672
Saturn
Rhea
1684
Saturn
Dione
1684
Saturn
Tethys
1787
Uranus
Oberon
Year of discovery
Planet
Answer
1787
Uranus
Titania
1789
Saturn
Enceladus
1789
Saturn
Mimas
1846
Neptune
Triton
1851
Uranus
Ariel
1851
Uranus
Umbriel
1877
Mars
Deimos
1877
Mars
Phobos
1892
Jupiter
Amalthea
1898
Saturn
Phoebe
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1 Comments
+1
Level 49
Nov 12, 2025
missing hyperion in 1848