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Rank the Galilean moons of Jupiter from fastest to slowest orbital speeds

Question

Rank the Galilean moons of Jupiter from fastest to slowest orbital speeds

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Solution

The Galilean moons of Jupiter, from fastest to slowest orbital speeds, are as follows:

  1. Io
  2. Europa
  3. Ganymede
  4. Callisto

Here's why:

  1. Io: It is the closest Galilean moon to Jupiter, and it orbits the planet in about 1.77 Earth days. Due to its proximity to Jupiter, it experiences the strongest gravitational pull, which results in the fastest orbital speed among the Galilean moons.

  2. Europa: This moon is the next closest to Jupiter after Io, and it orbits Jupiter in about 3.55 Earth days. Its orbital speed is slower than Io's due to its greater distance from Jupiter.

  3. Ganymede: It is the third closest Galilean moon to Jupiter, and it orbits the planet in about 7.15 Earth days. Its greater distance from Jupiter compared to Io and Europa results in a slower orbital speed.

  4. Callisto: This is the furthest Galilean moon from Jupiter, and it orbits the planet in about 16.69 Earth days. Its large distance from Jupiter results in the slowest orbital speed among the Galilean moons.

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