The story
From its position as the tenth planet out from the Sun (Sol).
Etymology from Wiktionary, CC BY-SA 4.0.
Sol X
Today it means: An alternate name for a trans-Neptunian object. Full definition →
Today it means: An alternate name for a trans-Neptunian object. Full definition →
From its position as the tenth planet out from the Sun (Sol).
Etymology from Wiktionary, CC BY-SA 4.0.