# Tag Info

### Are these Jupiter's moons?

Whether the specks of light are actually the Galilean moons or not, you probably can see Ganymede and Callisto more easily than Io and Europa. The latter are closer to Jupiter and more likely to be ...
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### At what point above Jupiter is the gravity Earth-like?

Jupiter's gravity can never be fully Earth-like. We can compute a height at which the acceleration matches Earth, but the associated tidal force would be less. Above a massive spherical body the ...
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According to Newton, the gravitational acceleration of a spherical body is given by $$a = \frac{GM}{r^2}$$ where $GM$ is the standard gravitational parameter and $r$ is the radial distance from the ...