Crossword puzzle clue "least dense planet"

Here are the possible solutions for least dense planet clue

Answer
Clue
Relevancy
saturn
Clue
Least dense planet
rarest
Clue
Least dense
Definition
RARE, not common
sparsest
Clue
Least dense
altairiv
Clue
The planet in the sci-fi classic "Forbidden Planet"
earth
Clue
"Planet of the Apes" planet
"Planet of the Apes" planet [spoiler alert!]
Definition
to cover with soil
eris
Clue
Largest dwarf planet almost named the tenth planet in 2003
mars
Clue
Planet explored by Calvin and Hobbes in "Weirdos From Another Planet!"
Definition
MAR, to spoil or damage

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