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few moonsSpace
•76% Informative
Not every planet has a moon so why do some planets have several moons, while others have none? Currently, there are two main theories for why planets have moons.
Moons are either gravitationally captured if they are within what's called a planet's Hill sphere radius, or they’re formed along with a solar system.
Jupiter , Saturn , Uranus and Neptune have larger Hill sphere radii, because they are much larger than Earth , Mars , Mercury and Venus .
VR Score
85
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87
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60
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informal
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English
Language complexity
36
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not hateful
Attention-grabbing headline
not detected
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not detected
Time-value
long-living
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14
Source diversity
8