 El is the partly visible crater in the upper right. | |
| Feature type | Impact crater |
|---|---|
| Coordinates | 1°01′N151°22′W / 1.01°N 151.36°W [1] |
| Diameter | 55 km [1] |
| Eponym | El |
El is a crater on Ganymede. It has a small "pit" in its center. Craters with such a "central pit" are common across Ganymede and are especially intriguing since they may reveal secrets about the structure of the satellite's shallow subsurface. [2]
Callisto, or Jupiter IV, is the second-largest moon of Jupiter, after Ganymede. In the Solar System it is the third-largest moon after Ganymede and Saturn's largest moon Titan, and nearly as large as the smallest planet Mercury. Callisto is, with a diameter of 4,821 km, roughly a third larger than Earth's Moon and orbits Jupiter on average at a distance of 1,883,000 km, which is about five times further out than the Moon orbiting Earth. It is the outermost of the four large Galilean moons of Jupiter, which were discovered in 1610 with one of the first telescopes, and is today visible from Earth with common binoculars.
Ganymede, or Jupiter III, is the largest and most massive natural satellite of Jupiter, and in the Solar System. Despite being the only moon in the Solar System with a substantial magnetic field, it is the largest Solar System object without a substantial atmosphere. Like Saturn's largest moon Titan, it is larger than the planet Mercury, but has somewhat less surface gravity than Mercury, Io, or the Moon due to its lower density compared to the three. Ganymede orbits Jupiter in roughly seven days and is in a 1:2:4 orbital resonance with the moons Europa and Io, respectively.
EL, El or el may refer to:
Neith crater is a crater on Jupiter's moon Ganymede, the largest moon in the solar system.
Nergal crater is a crater on Jupiter's moon Ganymede. It has a distinctive ejecta blanket surrounding it that's darker nearer the craters and brighter further away. The inner region of the ejecta is characterized by a lobate appearance indicative of the flow of a liquid substance over the surface. The flow was probably icy surface material melted by the energy released during the impact that formed the crater.
In planetary nomenclature, a fossa is a long, narrow depression (trough) on the surface of an extraterrestrial body, such as a planet or moon. The term, which means "ditch" or "trench" in Latin, is not a geological term as such but a descriptor term used by the United States Geological Survey (USGS) and the International Astronomical Union (IAU) for topographic features whose geology or geomorphology is uncertain due to lack of data or knowledge of the exact processes that formed them. Fossae are believed to be the result of a number of geological processes, such as faulting or subsidence. Many fossae on Mars are probably graben.
Odysseus is the largest crater on Saturn's moon Tethys. It is 445 km across, more than 2/5 of the moon's diameter, and is one of the largest craters in the Solar System. It is situated in the western part of the leading hemisphere of the moon—the latitude and longitude of its center are 32.8°N and 128.9°W, respectively. It is named after the Greek hero Odysseus from Homer's the Iliad and the Odyssey. Odysseus was discovered by the Voyager 2 spacecraft on 1 September 1981 during its flyby of Saturn.
A crater chain is a line of craters along the surface of an astronomical body. The descriptor term for crater chains is catena, plural catenae, as specified by the International Astronomical Union's rules on planetary nomenclature.
Enki Catena is a crater chain on Ganymede measuring 161.3 kilometres (100.2 mi) long.
Gula is a crater on Ganymede. It is a fresh crater with a distinctive central peak. It is about 40 km in diameter.
Achelous is a relatively fresh crater on Ganymede adjacent to the similarly sized Gula. It was found on April 5, 1997 by the Galileo Spacecraft. It has an outer lobate ejecta deposit which extends with a radius of about a crater from the rim
Galileo Regio is a large, dark surface feature on Jupiter's moon Ganymede.
Memphis Facula is a palimpsest, or "ghost crater", on Ganymede, the largest of the Jovian satellites.
Gibran is a crater on Mercury and is in the east of the Shakespeare quadrangle. It was named after Lebanese-American poet Khalil Gibran in 2009. Gibran is located east of the rayed crater of Degas and nearby Damer.
A palimpsest, in planetary astronomy, is an ancient crater that has been degraded over time. They may also be referred to as "ghost craters", "degraded craters", "buried craters", or "pathological craters". Palimpsests have been identified on Mercury, the Earth, the Moon, Mars, Ganymede, Callisto, and possibly even Titan. On Mars, these features are morphologically described as craters that are "flat-floored, rimless, extremely shallow, without central peaks, and would probably represent what remains after erosion."
Nadine Gail Barlow (1958–2020) was an American planetary scientist. She was a professor in the Department of Physics and Astronomy at Northern Arizona University (NAU). She became Associate Chair of the NAU Department of Physics and Astronomy in Fall 2010. She was also the director of the Northern Arizona University/NASA Space Grant Program and an associate director of the Arizona Space Grant Consortium.
A crater is a landform consisting of a hole or depression on a planetary surface, usually caused either by an object hitting the surface, or by geological activity on the planet. A crater has classically been described as: "a bowl-shaped pit that is formed by a volcano, an explosion, or a meteorite impact". On Earth, craters are "generally the result of volcanic eruptions", while "meteorite impact craters are common on the Moon, but are rare on Earth".
Epigeus is the largest known impact crater on Jupiter's Galilean satellite Ganymede, with a diameter of 343 km. It is 6.5% the mean equatorial diameter of Ganymede, 5,270 km (3,270 mi). It is located in Marius Regio at 22.96°N 179.35°E.
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