Janus
Related Category: Astronomy: General
(j´ns), in astronomy, one of the 18 named moons, or natural satellites, of Saturn.
Janus (moon)
: Saturn X redirects here. For the spurious moon reported in 1905, see Themis (moon)Janus
Janus_moon.jpg ...
Janus
Saturn X
Janus ( "JAY nus" ) is the sixth of Saturn's known satellites: orbit: 151,472 km from Saturn diameter: 178 km (196 x 192 x 150) mass: 2.01e18 kg ...
Janus
Saturn X - 1980S1
Janus [JAY-nus] is the sixth satellite of Saturn. It was discovered by Audouin Dollfus in 1966 and was named after the god of gates and doorways. It is depicted with two faces looking in opposite directions.
Janus
The innermost satellite of Saturn, just outside Saturn's rings. P = 0.75 days; R = 175 (?) km; i 0; e 0. It was discovered by Dollfus in 1966 and was named Janus for the first and the last.
JD ...
Janusz Palubicki is a Polish politician and activist.Born in 1948 in Walbrzych, he studied history of art in University of Poznan. From 1981 he was the member of Solidarity, in 1982 he became the leader of Wielkopolska part of the movement....
JANUS
Janus is one of the smaller of the 18 moons of Saturn. This heavily-cratered moon orbits at a mean distance of about 94,000 miles (151,472 km) and revolves around Saturn in about 18 hours. Janus has a diameter of about 185 miles.
Janus was discovered by the French astronomer Audouin Dollfus in 1966. The name Janus comes from the Greek god of gates and doors. Janus is also the root of the name January.
Mimas ...
Janus: Moon of Saturn
Jovian moon: Moon of Jupiter
Jovian planet: Another term for a gas giant.
Janus and Epimetheus switch orbits every few years, alternating which is closer to Saturn.
Atlas, Pan, Pandora, Prometheus and others are shepherd moons that herd particles orbiting Saturn into rings.
Janus and Epimetheus are co-orbital moons. These two moons are of roughly equal size and have orbits with only a few kilometers difference in diameter, close enough that they would collide if they attempted to pass each other.
2,9. Janus and Epimetheus are 'coorbital' and undergo orbit changes at approximately 4 year intervals.
Janus
151,460 ...
Janus (NASA Thesaurus) One of the natural satellites of Saturn. Japanese spacecraft (NASA Thesaurus) Spacecraft operated by the Japanese government. Used for MOS (Japanese spacecraft).
Just 10,000 km beyond the F ring lie the so-called co-orbital satellites Janus and Epimetheus. As the name implies, these two satellites "share" an orbit, but in a very strange way.
January: named after Janus, protector of the gateway to heaven
February: named after Februalia, a time period when sacrifices were made to atone for sins ...
The co-orbital satellites Janus and Epimetheus (S10 and S11) share the same average orbit, interacting with each other every few years in such a way that one transmits angular momentum to the other, ...
It was later named Janus. A few years later it was realized that all observations of 1966 could only be explained if another satellite had been present and that it had an orbit similar to that of Janus.
Next come Epimetheus (left) and Janus (right). Scientists think that these two moons were once part of a single moon that was later blasted apart. This claim is supported by the fact that their orbits are within thirty miles of each other.
Covered by grooves, valleys, and craters over 30 km in diameter. Shares orbit with Janus (they are only separated by about 50 kilometers (31 miles)). Once every four years they approach each other, exchange some momentum and switch orbits.
Janus ...
A second moon, Janus, is in the middle of the images. This small moon orbits inside the rings, where its gravity helps keep the ring particles in line.
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 Athenian New Year began with the appearance of Sirius. He was seen as two-headed, like the Roman God Janus: looking back at the past year and forward to the new one.
In the September event Cassini imaged a tenuous new ring, outside the main rings but inside the fainter G and E rings. It coincides with the orbit of the small moons Janus and Epimetheus.
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.
Epimetheus shares an orbit with Janus (they are only separated by about 50 kilometers (31 miles)). Once every four years they approach each other, exchange some momentum and switch orbits. This icy moon was discovered from work done by astronomers R.
It was discovered by Cassini in 1675. The period of a particle in Cassini's division is about two-thirds that of Janus, one-half that of Mimas, one-third that of Enceladus, and one-quarter that of Tethys. [H76]
Cas A (3C 461) ...
Visible outside the brighter main rings of Saturn and inside the G and E rings, it coincides with the orbits of Saturn's moons Janus and Epimetheus (more discussion and images available from NASA's news release).
1476 of Matthias Corvinus, King of Hungary, to Beatrix of Naples, Buda became the one of the most important artistic centres of the Renaissance north of the Alps. The most important humanists living in Matthias' court were Antonio Bonfini and Janus ...
 See also: Saturn, Earth, Orbit, Planet, Satellite
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