Rings theories:
There are two major theories in relation to Saturn’s rings. In 19
th
century, the first known theory
was made by Edouard Roche. According to him, rings surrounding this planet were composed of
moons broken by comets and asteroids. On the other hand, the second theory disproved the first
speculation and believed that these rings were remnants of Nebula.
The planet’s rings:
Names of main rings came from letters A to F, while other ringlets are named after their
discoverers and gods and goddesses of Greek mythology.
Main rings have 7,000 km to 80,000 km extension located above
Saturn’s equator. These main
rings are composed of 1centimeter to 10 meter sized particles and have an overall mass of
3 x 10
19
kilograms. They use more than 15 billion sq. miles of area which is eighty times that of
the Earth’s area. Moreover, these rings are composed of ice particles.
Ring A and B are among the brightest rings, while the latter is described to be wide and thick. C
ring is also known as ‘crepe ring’ due to its transparency compared to Ring D’s indistinct
visibility. F ring is very thin in size and is flanked by two moons (Pandora and Prometheus).
These two moons are known as ‘shepherding moons’ for they have power over movements of
ring’s particles.
Here are some names used by rings and ringlets:
For major subdivisions, names like D ring, C ring, B ring, Cassini division, A ring, Roche
division, F ring, Janus ring, G ring, Methone ring arc, Anthe ring arc, Pallene ring, E ring, and
Phoebe ring are utilized. C ring structures used names like Colombo gap, Titan ringlet, Maxwell
gap, Maxwell ringlet, Bond gap, 1.470Rs ringlet, 1495Rs ringlet, and Dawes gap.
In Cassini division, Huygens gap, Huygens ringlet, Herschel gap, Russell gap, Jeffreys gap,
Kuiper gap, Laplace gap, Bessel gap, and Barnard gap are some of names used. A ring structures
named gaps ‘Encke’ and ‘Keeler’.
Latest discovery:
In the year 2009, a new discovery was announced by NASA. Saturn has a new ring described to
be colossal and only appears in infrared portion of the spectrum. This was found through
advance technology used by Spitzer Telescope. According to Scientists, if this ring is visible in
the Earth, it will look like two moon-sized rings in the sky.