TETHYS, in Astronomy

tēˈthĭs, in astronomy, one of the 18 named moons, or natural satellites, of Saturn. Also known as Saturn III (or S3), Tethys is 659 mi (1060 km) in diameter, orbits Saturn at a mean distance of 183,093 mi (294,660 km), and has equal orbital and rotational periods of 1.8878 earth days. Tethys was discovered by the Italian-French astronomer Gian Domenico Cassini in 1684. Tethys's low density (1.2) implies that is composed primarily of water ice. The heavily cratered satellite has two dominant surface features: one is an impact crater—called Odysseus—about 250 mi (400 km) in diameter that is quite flat and without the high wall and central peak common on the moon; the other a huge valley—called Ithaca Chasma—that is 63 mi (100 km) wide, 2.5 mi (4 km) deep, and 1,250 mi (2,000 km) long, stretching three quarters of the way around Tethys's circumference. Tethys is co-orbital with two other moons; that is, they orbit Saturn at the same distance as Tethys but precede (Telesto) and follow (Calypso) Tethys by about 60°.

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The Columbia Encyclopedia, Sixth Edition Copyright© 2004, Columbia University Press. Licensed from Lernout & Hauspie Speech Products N.V. All rights reserved.

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Questia Books and Articles on: Tethys in Astronomy
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books on: Tethys in Astronomy  - 14 results

       More book Results: 1-10 11-14 >>  
 
1.
A Dictionary of Astronomy
Book by Ian Ridpath; Oxford University Press, 1997
Subjects: Astronomy--Dictionaries
...observatory with a 10.4-m dish for millimetre and submillimetre astronomy, opened in 1987 at an altitude of 4070 m on Mauna Kea, Hawaii...satellite of Saturn, sharing the same orbit as * Telesto and * Tethys; also known as Saturn XIV. Its distance is 294660 km, and...
2.
Astronomy: A Revision of Young's Manual of Astronomy - Vol. 1
Book by Henry Norris Russell, Raymond Smith Dugan, John Quincy Stewart; Ginn, 1926
Subjects: Astronomy, Solar System
...filter. From left to right they are Titan, Rhea, Dione, Tethys, Mimas, and Enceladus. The image of the planet and the ring...center , in a period of 22 h 37 m . The next four, Enceladus, Tethys, Dione, and Rhea, follow closely outside it, with periods...
3.
Popular Astronomy: Being the New Descriptive Astronomy
Book by Joel Dorman Steele; American Book Company, 1899
Subjects: Astronomy
...Approximate diameter in miles. Sidereal Period in days. I Mimas 117,000 600 0.94 II Enceladus 157,000 800 1.37 III Tethys 186,000 1,200 1.88 IV Dione 238,000 1,100 2.73 V Rhea 332,000 1,600 4.51 VI Titan 771,000 2,700 15.94...
4.
Larousse Encyclopedia of Astronomy
Book by Lucien Rudaux, G. Vaucouleurs De, F. L. Whipple; Prometheus Press, 1962
Subjects: Astronomy
...MLS. PERIOD INC. DISCOVERY I. Mimas 300 113 22h 37M 26 45 Herschel 1798 ll. Enceladus 400 149 1d 8h 53m 26 45 " 1798 III. Tethys 600 183 1d 21h 18gm 26 45 Cassini 1684 IV. Dione 600 235 2d 17h 41m 26 45 " 1684 V. Rhea 850 328 4d 12h 25m 26 42 " 1672 VI...
5.
Essays in Astronomy
Book by Sir Robert S. Ball, William Harkness, Sir John Herschel, William Huggins, Marquid de Laplace, Ormsby McKnight Mitchel, Richard Proctor, M. Schiaparelli, Edward Singleton Holden; D. Appleton & Company, 1900
Subjects: Astronomy
...telescope, the others all being with refracting instruments. Cassinis discovery in 1684 of the two satellites now known as Tethys and Dione, was not accepted as conclusive until long afterward, when Pound, 1718, with a telescope 123 feet in length...
More book Results: 1-10 11-14 >>

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encyclopedia articles on: Tethys in Astronomy  - 5 results

 
 
1.
Tethys , in Astronomy
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
TETHYS , in astronomy te this, in astronomy, one of the named moons, or natural satellites, of Saturn . Also known as Saturn III (or S3), Tethys is 659 mi (1060 km) in diameter, orbits Saturn at a mean distance...
2.
Saturn , in Astronomy
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
SATURN , in astronomy in astronomy, 6th planet from the sun. Astronomical...four satellites, Mimas , Enceladus , Tethys , and Dione ; the three Alkyonides...within the last 100 million years. Tethys also has a very large impact crater...
3.
Calypso , in Astronomy
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
CALYPSO , in astronomy in astronomy, one of the named moons, or natural satellites, of Saturn...Telescope. Calypso is co-orbital with two other moons, Telesto and Tethys ; that is, they orbit Saturn at the same distance. Calypso and...
4.
Mimas
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
MIMAS mi mas, in astronomy, one of the named moons, or natural satellites, of Saturn . Also...resulted from the same impact. Mimas forms a satellite pair with Tethys ; that is, the two moons interact gravitationally...
5.
Telesto
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
TELESTO t les to, in astronomy, one of the named moons, or natural satellites, of Saturn . Also...observations. Telesto is co-orbital with two other moons, Calypso and Tethys ; that is, they orbit Saturn at the same distance. Telesto and...


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