Keep your letter short, focused, and interesting. In general, letters should be under 200 words, 150 or less is best; stay focused on one (or, at the most, two) main point(s); and get to the main point in the first two sentences. If possible include interesting facts, relevant personal experience, and any local connections to the issue.
Jupiterâs Moons â 67. Jupiter is swarming with at least 67 moons in orbit around it, the largest number of natural satellites around any of the planets. Jupiterâs 4 largest moons; Ganymede, Callisto, Io and Europa are known as the Galilean Moons, named after their discoverer Galileo Galilei.
Main group or Galilean moons: Io, Europa, Ganymede and Callisto. They are some of the largest objects in the Solar System outside the Sun and the eight planets in terms of mass and are larger than any known dwarf planet. Ganymede exceeds even the planet Mercury in diameter.