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.
Ganymede â It is the largest moon in the solar system with a 5262.4 km diameter. Though it is larger than Mercury, Ganymede only has half the planetâs mass. Callisto â It is the third largest moon in the solar system with a 4820.9 km diameter. It is the least dense Galilean moons being composed mainly of rock and ice. Amalthea Group. Metis â The moon closest to Jupiter and due to tidal acceleration it will crash on Jupiterâs surface eventually.