Tethys
Related Category: Astronomy: General
(t´ths), in astronomy, one of the 18 named moons, or natural satellites, of Saturn.
Tethys (moon)
There is also an asteroid named 17 Thetis.Tethys
Tethys, as imaged by Cassini Discovery Discovered by
Giovanni Cassini Discovered in
March 21, 1684 Orbital characteristics Semimajor axis
294,619 km Eccentricity
0.
Tethys
Saturn III
Tethys ( "TEE this" ) is the ninth of Saturn's known satellites: orbit: 294,660 km from Saturn diameter: 1060 km mass: 6.22e20 kg ...
Tethys
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Tethys
Saturn III
Tethys [TEE-this] was discovered by Giovanni Cassini in 1684. It is an icy body similar in nature to Dione and Rhea. The density of Tethys is 1.21 gm/cm3, indicating that it is composed almost entirely of water-ice.
Tethys
The south pole of Saturn's moon Tethys, as seen from the Cassini spacecraft. The giant rift Ithaca Chasma stretches across the left side of this view. Image: NASA/JPL/Space Science Institute Tethys is an icy moon with a diameter of 1060 km.
Tethys
Fourth satellite of Saturn, discovered by Cassini in 1684. Diameter about 1000 km; P = 1.87 days.
TeV ...
Tethys, although larger than Enceladus, shows little evidence of internal activity. Its heavily cratered surface appears to be quite old, although it displays subtle features indicative of creep or viscous flow in its icy lithosphere.
TETHYS
Tethys is one of the larger of the 18 moons of Saturn. This icy moon is heavily cratered and has many cracks and plains. It has a diameter of about 600 miles (1000 km).
Tethys, Saturn's very own radiation shield. Image: NASA/JPL/Space Science Institute.
Tethys is like a giant ice cube in the sky. It is almost pure water Ice. At one time long ago it was liquid. It would have been a giant ocean, with no land, and no sea bed. Or like a giant blob of water floating in the sky.
Tethys has a canyon running three-quarters of the way around its surface. It once may have split almost in half.
Dione and Rhea have wispy white markings on one side.
Tethys -- In Greek mythology, a sea goddess.
Tharsis -- In the Bible, a land at the western extremity of the known world. Thought to be a region in modern-day Spain.
Tethys (mythology)
File:Tethys mosaic 83d40m Phillopolis mid4th century -p2fx.2.
Tethys is known to have a density very close to that of water, indicating that it is likely composed mainly of water ice. Its frozen mysteries await Cassini's planned close flyby in September 2005.
Tethys (NASA Thesaurus / NASA SP-7, 1965) A satellite of Saturn orbiting at a mean distance of 295,000 kilometers.
The Saturnian moon Tethys has two smaller moons in its L4 and L5 points, Telesto and Calypso. The Saturnian moon Dione also has two Lagrangian co-orbitals, Helene at its L4 point and Polydeuces at L5.
The five larger inner satellites-Mimas, Enceladus, Tethys, Dione, and Rhea-are roughly spherical in shape and composed mostly of water ice. Rocky material may constitute up to 40 percent of Dione's mass.
The Cassini spacecraft snapped views of Saturn's moons Enceladus (left) and Tethys as it flew past them on August 13 and 14, respectively.
Inside Rhea's orbit lie the orbits of Tethys and Dione. These two moons are comparable in size and have masses somewhat less than half the mass of Rhea.
By increasing proximity to Saturn, the middle moons are Iapetus, Hyperion, Titan, Tethys, Dione, Rhea, Enceladus, and Mimas.
SATURN S_RINGS SYSTEM MIMAS ENCELADUS TETHYS DIONE RHEA TITAN HYPERION IAPETUS PHOEBE JANUS EPIMETHEUS PANDORA CALYPSO HELENE TELESTO or SATURN S_RINGS SYSTEM MIMAS ENCELADUS TETHYS DIONE RHEA TITAN HYPERION IAPETUS PHOEBE JANUS EPIMETHEUS PANDORA ...
List of geological features on Tethys
List of geological features on Dione
List of geological features on Rhea
List of geological features on Iapetus
List of craters on Puck
List of geological features on Miranda ...
Two small moons have been found to share Tethys's orbit, and one small moon shares Dione's orbit. This sharing of orbits had not been seen before the detailed investigation of Saturns system.
Calypso an orbit with (294,660 km from the center of ); these 2 moons are also called the Tethys Trojans because they orbit Saturn in Tethys' orbit, Telesto is 60° ahead of , Calypso is 60° behind Tethys.
Three of Saturn's icy moons (Tethys, Dione, and Rhea) are visible as small dots of light at the bottom of the picture. The shadow of Tethys can be seen under Saturn's rings. (Courtesy of the Jet Propulsion Laboratory/NASA) ...
Tethys (named after a Greek sea goddess) and Dione (a daughter of Zeus) Mimas, and Enceladus (son of the god Titan) are the names of four of Saturn's other moons. The planet was named in the 6th century after the Roman god of agriculture.
Hera was now even more enraged to find her rival glorified among the stars, so she consulted her foster parents Tethys and Oceanus, gods of the sea, and persuaded them never to let the bear bathe in the northern waters.
Some of the names are possibly familiar to you - Pan, Daphnis, Atlas, Prometheus, Pandora, Epimetheus, Janus, Mimas, Methone, Pallene, Enceladus, Tethys, Telesto, Calypso, Dione, Helene, Polydeuces, Rhea, Titan, Hyperion, Iapetus, Kiviuq, Ijiraq, ...
The derived SI unit of magnetic flux density. 1 Tesla = 1 Wb m-2 = 104gauss. [H76]
Tethys
Fourth satellite of Saturn, discovered by Cassini in 1684. Diameter about 1000 km; P = 1.87 days. [H76]
TeV ...
Some time later, Giovanni Domenico Cassini discovered four other moons: Iapetus, Rhea, Tethys and Dione.
In 1675, Cassini also discovered the gap now known as the Cassini Division.
The moon Mimas displays a large crack 2 km (about 1 mile) deep. Tethys is marked by a crack extending 3/4 of the way around it's circumference.
In order to prevent the destruction of the Enterprise, its crew created the illusion that the Paxan planet was a frozen gas giant similar to Tethys III, and that the system contained a wormhole that flung the starship 0.
Giovanni Domenico Cassini (1625-1712) was an astronomer born in Italy who later became a naturalized French citizen. He discovered four of Saturn's moons (Tethys, Dione, Rhea, and Iapetus) and a dark division in Saturn's rings (called the Cassini ...
Saturn's known moons are (from nearest to furthest from the planet): Pan, Atlas, Prometheus, Pandora, Epimetheus, Janus, Mimas, Enceladus, Tethys, Telesto, Calypso, Dione, Helene, Rhea, Titan, Hyperion, Iapetus, and Phoebe.
Trojan satellites
satellites which orbit at the Lagrangian points, 60° ahead of and 60° behind another satellite. For example, Telesto and Calypso are trojans of Saturn's satellite Tethys.
Other examples of Trojan bodies in the solar system include daughter satellites that orbit in the Trojan points of the Saturn-Tethys system, and an additional satellite (Helene) which orbits in the forward Trojan point of Saturn and Dione.
Trojans of Neptune, all associated with the leading Lagrangian point, were discovered beginning in 2001. Although Trojans of Saturn have yet to be found, objects librating about Lagrangian points of the systems formed by Saturn and its moon Tethys ...
 See also: Saturn, Earth, Orbit, Solar, Moon
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