Mimas is the seventh-largest natural satellite of Saturn. With a mean diameter of 396.4 kilometres or 246.3 miles, Mimas is the smallest astronomical body known to be roughly rounded in shape due to its own gravity. Mimas's low density, 1.15 g/cm, indicates that it is composed mostly of water ice with only a small amount of rock, and study of Mimas's motion suggests that it may have a liquid ocean beneath its surface ice. The surface of Mimas is heavily cratered and shows little signs of recent geological activity. A notable feature of Mimas's surface is Herschel, one of the largest craters relative to the size of the parent body in the Solar System. Herschel measures 139 kilometres (86 miles) across, about one-third of Mimas's mean diameter, and formed from an extremely energetic impact event. The crater's name is derived from the discoverer of Mimas, William Herschel, in 1789. The moon's presence has created one of the largest 'gaps' in Saturn's ring, named the Cassini Division, due to orbital resonance destabilising the particles' orbit there.
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- ⭐ Core Definition: Mimas (moon)
- Mimas (moon) in the context of Planetshine
- Mimas (moon) in the context of Solar System object
- Mimas (moon) in the context of 40-foot telescope
- Mimas (moon) in the context of Chasma
Mimas (moon) in the context of Planetshine
Planetshine is the dim illumination, by sunlight reflected from a planet, of all or part of the otherwise dark side of any moon orbiting the body. Planetlight is the diffuse reflection of sunlight from a planet, whose albedo can be measured.
The most observed and familiar example of planetshine is earthshine on the Moon, which is most visible from the night side of Earth when the lunar phase is crescent or nearly new, without the atmospheric brightness of the daytime sky. Typically, this results in the dark side of the Moon being bathed in a faint light.
View the full Wikipedia page for PlanetshineMimas (moon) in the context of Solar System object
The following is a list of Solar System objects by orbit, ordered by increasing distance from the Sun. Most named objects in this list have a diameter of 500 km or more.
- The Sun, a spectral class G2V main-sequence star
- The inner Solar System and the terrestrial planets
- Mercury
- Venus
- Earth
- Mars
- Asteroids in the asteroid belt, between the orbits of Mars and Jupiter
- Ceres, a dwarf planet
- Vesta
- Pallas
- Hygiea
- Europa (asteroid)
- Davida
- Sylvia
- Asteroids number in the hundreds of thousands. For longer lists, see list of exceptional asteroids, list of asteroids, or list of Solar System objects by size.
- A number of smaller groups distinct from the asteroid belt
- The outer Solar System with the giant planets, their satellites, trojan asteroids and some minor planets
- Jupiter
- Saturn
- Uranus
- Rings of Uranus
- Complete list of Uranus's natural satellites
- Uranus trojan (2011 QF99)
- Uranus-crossing minor planets
- Neptune
- Non-trojan minor planets
- Trans-Neptunian objects (beyond the orbit of Neptune)
- Kuiper-belt objects (KBOs)
- Plutinos
- Orcus, a dwarf planet
- Pluto, a dwarf planet
- Complete list of Pluto's natural satellites
- Ixion
- Achlys
- Twotinos
- Cubewanos (classical objects)
- Plutinos
- Scattered-disc objects
- Detached objects
- (612911) 2004 XR190
- 2012 VP113 (possibly inner Oort cloud)
- Sedna, a dwarf planet (possibly inner Oort cloud)
- Oort cloud (hypothetical)
- Kuiper-belt objects (KBOs)
Mimas (moon) in the context of 40-foot telescope
William Herschel's 40-foot telescope, also known as the Great Forty-Foot telescope, was a reflecting telescope constructed between 1785 and 1789 at Observatory House in Slough, England. It used a 48-inch (120 cm) diameter primary mirror with a 40-foot-long (12 m) focal length (hence its name "Forty-Foot"). It was the largest telescope in the world for 50 years. It may have been used to discover Enceladus and Mimas, the 6th and 7th moons of Saturn. It was dismantled in 1840 by Herschel's son John Herschel due to safety concerns; today the original mirror and a 10-foot (3.0 m) section of the tube remain.
View the full Wikipedia page for 40-foot telescopeMimas (moon) in the context of Chasma
In planetary nomenclature, a chasma /ˈkæzmə/ (plural: chasmata /ˈkæzmətə/) is a deep, elongated, steep-sided depression. As of 2020, the IAU has named 122 such features in the Solar System, on Venus (63), Mars (25), Saturn's satellites Mimas (6), Tethys (2), Dione (8) and Rhea (5), Uranus's satellites Ariel (7), Titania (2) and Oberon (1) and Pluto's satellite Charon (3). An example is Eos Chasma on Mars.
View the full Wikipedia page for Chasma