Universe at a glance (part 2 & last part): Saturn •Saturn is the sixth planet from the Sun and the second largest. •Saturn has 62 known moons, fifty-three have been named. Most of them are small in size. •Names of some of Saturn’s moons: the largest is Titan, discovered in 1655; Tethys, Dione, Rhea, & Iapetus, discovered from 1671 to 1672; Mimas & Enceladus, discovered in 1789; and Hyperion, discovered in 1848. •A year on Saturn is equal to 29.5 Earth Years •Pioneer 11 is the first spacecraft to reach Saturn, in 1979 •Saturn has a prominent ring system that consists of nine continuous main rings and three discontinuous arcs, composed mostly of ice particles with a smaller amount of rocky debris and dust. Uranus •The orbital speed of Uranus is 6.6 km/sec •Uranus takes 84 Earth years to complete one orbit. •Uranus is the third largest planet in the Solar System. •Voyager 2, the only spacecraft to visit Uranus, •A day on Uranus is equal to a little more than 17 hours on Earth. •Uranus has 27 known moons, named for characters from the works of William Shakespeare or Alexander Pope •Uranus was discovered by Sir William Herschel in 1781 Neptune •Neptune is the fourth largest planet and coolest planet in the Solar System. •Neptune was the first planet located through mathematical predictions rather than through regular observations of the sky. •Neptune was discovered by Urbain Le Verrier, John Couch Adams, and Johann Galle on September 23, 1846. •The only spacecraft ever to visit Neptune was Voyager 2 in 1989. •The magnetic field of Neptune is about 27 times more powerful than that of Earth. •One Neptune year is equal to 164.83 Earth Years •Neptune has six known rings. •In 2011, Neptune completes its first 165-year orbit of the sun since its discovery in 1846. •Neptune has 13 moons, the largest of which is named Triton. The other moons are: Naiad, Thalassa, Despina, Galatea, Larissa, Proteus, Nereid, Halimede, Sao, Laomedeia, Neso, and Psamathe. Pluto •Pluto is the smallest planet in the Solar System, now consider as dwarf planet •Pluto is colder than Neptune. •Pluto’s journey around the Sun takes 248 Earth years. •Pluto is the second most contrast body in the Solar System •Pluto has not yet been visited by a spacecraft. •Pluto has a satellite, Charon, which was discovered (in 1978). The distance between them is 19,640 km (12,200 miles).The other 3 are Nix, Hydra, and newly discovered S/2011 P 1 on July of 2011. •Pluto rotation (a Pluto day) takes 6.4 Earth days, meaning that it has the second slowest rotation in the Solar System after Venus •Pluto was discovered by Tombaugh in 1930