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By Shapley H.

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This also makes Enceladus here, with Titan (orange) in the the brightest body in the background and Epimetheus (white) above. entire Solar System, apart from the Sun. 43 saturn Titan Scientists are really fascinated with Titan, and not just because it is the largest of Saturn’s moons. It is also the only moon in the Solar System known to have an atmosphere which, like Earth’s, is rich in nitrogen, one of the “building blocks” of life. Many scientists think Titan may be quite similar to the young planet Earth billions of years ago.

Cassini-Huygens also saw what appeared to be a number of small moons within the planet’s rings. Only one of these, now called Daphnis, has been officially recognized. It is the only moon, except for Pan, that is definitely found inside the Scientists hope that Cassini, or some other future Saturn mission, will collect more data to prove that Rhea is the only ringed moon in the Solar System. 51 saturn rings. Cassini-Huygens was not the only observer finding new moons. Astronomers on Earth, often working with new information they had received from the mission, identified at least nineteen small outer moons that were previously unknown.

The Star Guide. London: Quarto, 2005. Lovett, Laura, Joan Horvath, and Jeff Cuzzi. Saturn: A New View. New York: Abrams, 2006. NASA: Saturn. html Planet Quest: Exoplanet Exploration. cfm Saturn. Object=Saturn Saturn. html University of Tennesse-Knoxville. html 62 Index Page numbers in boldface indicate photos or illustrations. asteroid, 11, 15 belt, 15, 15 Atlas, 45 axis, 37 Cassini, Giovanni Domenico, 26 Cassini-Huygens, 5, 31, 42, 47-55, 48, 50, 53 comets, 11 constellations, 8 Daphnis, 45, 51 density, 37 Dione, 26 Dragon Storm, 36, 36 Earth, 7, 11, 12, 14, 17, 37, 45, 57 compared to Saturn, 5, 34, 34, 38 Enceladus, 43, 45, 45 Epimetheus, 43, 43 galaxy, 10, 10 Galilei, Galileo, 22-23, 23 gas giants, 15-16, 30, 58 gravity, 5, 13-14, 21, 28, 37, 45 Great White Spot, 36 Hubble Space Telescope, 31 Huygens, Christiaan, 25, 25 Iapetus, 26 Jupiter, 15-16, 17, 37, 41 Keeler, James, 28 Kepler, Johannes, 22 light-year, 6, 7 Mars, 11, 14, 17 Maxwell, James Clerk, 27-28 Mercury, 11, 14, 17 Methone, 51 Minas, 44, 44 moons, 5, 26, 41-45, 42, 43, 44, 45, 58 mythology, 20-21, 21 Pallene, 51 Pan, 45, 51 Pandora, 45 Phoebe, 42, 42, 50-51 Pioneer 11, 29-30, 29 planets, 17 dwarf, 11 See also Pluto formation of, 13-16 terrestrial, 11 See also Earth, Mars, Mercury, Venus Pluto, 17 Polydeuces, 51 Prometheus, 45 Rhea, 26, 51-52, 51 rings, 6, 22-23, 24, 25-28, 30-31, 39-41, 40, 41, 43, 51, 52, 56, 58 Roche, Edouard, 28 63 saturn Saturn, atmosphere, 16, 31, 35, 35, 38 core, 33-34, 34 day (length of), 37, 38, 58 discovery of, 6-8, 19, 22-23, 58 distance from Earth, 58 distance from the Sun, 38, 58 formation of, 13-14, 15-16 god, 20-21, 21 magnetism, 35, 35 moons of, 5, 26, 41-45, 42, 43, 44, 45, 58 orbit, 5, 45 rings, 5, 6, 22-23, 24, 25-28, 30-31, 39-41, 40, 41, 43, 51, 52, 56, 58 names of, 28 rotation, 37 shape, 37 size, 5, 34, 38, 58 surface, 16, 34 temperature, 36-37, 38, 58 weather, 36-37, 36 year (length of), 38, 45, 58 Solar System, 5, 11-17, 17 formation of, 13 spacecraft, 29, 47-55 See also Cassini-Huygens, Pioneer 11, Voyager stars, 8, 9, 10, 11, 12 Storm Alley, 36, 36 Sun, 5, 11, 12, 12, 13-17, 22, 40, 45, 57 telescope, 7, 22-23, 23, 56-57 Tethys, 26 Titan, 31, 44, 49, 52-54, 53, 54, 56 universe, 6 Uranus, 15-16, 17 Venus, 11, 14, 17 viewing Saturn, 19-20, 22-23, 56-57 Voyager, 1, 30-31, 30 2, 30-31 about the author Terry Allan Hicks has written more than twenty children’s books about everything from why people catch colds to how mountains form.

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A Short Period Cepheid with Variable Spectrum (1916)(en)(5s) by Shapley H.


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