Jupiter’s moons

On this day, January 7th, in 1610 Galileo Galilei, an Italian astronomer, physicist and engineer, discovered three of Jupiter’s moons; Io, Europa and Ganymede.

Here are some facts about Jupiter and it’s moons:

  1. Ganymede is the largest of Jupiter’s moons. It’s larger than the planet Mercury.
  2. Calypso is the 2nd largest of Jupiter’s moons. It’s almost as large as the planet Mercury.
  3. Jupiter is the 4th brightest object in the sky.
  4. Jupiter is one of the 5 planets visible to the naked eye from Earth.
  5. Jupiter has the shortest days of all the planets in our solar system.
  6. Jupiter’s ring is composed mainly of dust particles.
  7. The famous red spot on Jupiter is a huge storm. It’s been raging for more than 350 years.

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