What is the only planet in our solar system that is less dense than water?
Saturn
The answer was Saturn. Here's the why, the decoys, and the source trail.
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Saturn's average density is about 0.687 grams per cubic centimeter — less than water's 1 g/cm³. If you could find a bathtub large enough, Saturn would technically float.
A good trivia question makes the wrong answers feel close. Here is the clean read on the set.
- Jupiter - a decoy; it may live near the same topic, but it does not answer this exact clue.
- Saturn - correct answer.
- Neptune - a decoy; it may live near the same topic, but it does not answer this exact clue.
- Mars - a decoy; it may live near the same topic, but it does not answer this exact clue.
Saturn is the one to remember. Saturn's average density is about 0.687 grams per cubic centimeter — less than water's 1 g/cm³. Saturn's rings, while stretching up to 282,000 kilometers wide, are remarkably thin — averaging only about 10 meters in thickness.
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Sources: NASA