Mimas (bulan): Perbezaan antara semakan

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==Nama==
==Nama==
{{terjemah}}
{{terjemah}}
The name "Mimas" and the names of all seven satellites of Saturn then known were suggested by Herschel's son [[John Herschel]] in his [[1847]] publication ''Results of Astronomical Observations made at the Cape of Good Hope'' ([http://adsabs.harvard.edu//full/seri/MNRAS/0008//0000042.000.html])
Nama "Mimas" dan nama-nama kesemua tujuh satelit Zuhal yang diketahui telah dicadangkan oleh anak lelaki Herschel [[John Herschel]] dalam terbitan [[1847]] beliau ''Results of Astronomical Observations made at the Cape of Good Hope'' ([http://adsabs.harvard.edu//full/seri/MNRAS/0008//0000042.000.html])


According to Liddell and Scott's ''[[A Greek-English Lexicon|Greek-English Lexicon]],'' the adjectival form of Mimas/Mimans would be ''Mimantean'' (the [[genitive case]] is ''Mimantis,'' Greek ''Μῑμάντις).'' In practice, anglicisms such as ''Mimasian'' and ''Mimian'' are very occasionally seen, but more commonly writers simply use the phrase 'of Mimas'.
Menurut terbitan Liddell dan Scott ''[[A Greek-English Lexicon|Greek-English Lexicon]],'' bentuk adjektif Mimas/Mimans adalah ''Mimantean'' ([[kata nama]]nya ialah ''Mimantis,'' Greek ''Μῑμάντις).'' Secara praktikalnya, peminjaman perkataan Inggeris seperti ''Mimasian'' dan ''Mimian'' kerap dilihat, tetapi selalunya penulis-penulis menggunakan frasa 'of Mimas'.


== Ciri-ciri fizikal ==
== Ciri-ciri fizikal ==

Semakan pada 09:05, 19 Julai 2006

Mimas
Mimas, seperti diambil gambarnya oleh Cassini pada tahun 2005 (NASA)
Penjumpaan
Dijumpai oleh William Herschel
Dijumpai pada September 17, 1789
Ciri-ciri orbit
Paksi semimajor 185,404 km
Eccentricity 0.0202 [1]
Orbital period 0.9424218 d [2]
Inclination 1.51° (to Saturn's equator)
Is a satellite of Saturn
Physical characteristics
Purata diameter 397.2 km (418.2×392.4×382.8 km)

(0.0311 Earths)

Permukaan luas ~1,990,000 km2
Volume ~32,900,000 km3
Jisim 3.84×1019 kg

(6.4×10-6 Earths)

Purata ketumpatan 1.17 g/cm3
Permukaan graviti ~0.065 m/s2
Halaju lepas ~0.16 km/s
Rotation period synchronous
Axial tilt zero
Albedo 0.77
Permukaan suhu
min mean max
? K ~64 K ? K
Atmosfera tiada

Mimas (mye'-məs, IPA /ˈmaɪməs/, Bahasa Yunani Μίμᾱς, kadangkala Μίμανς) adalah satu bulan Zuhal yang telah dijumpai dalam tahun 1789 oleh William Herschel. Ianya dinamakan sempena Mimas, anak kepada Gaia dalam mitologi Yunani, dan ia juga telah dirangka sebagai Zuhal I.

Nama

Nama "Mimas" dan nama-nama kesemua tujuh satelit Zuhal yang diketahui telah dicadangkan oleh anak lelaki Herschel John Herschel dalam terbitan 1847 beliau Results of Astronomical Observations made at the Cape of Good Hope ([3])

Menurut terbitan Liddell dan Scott Greek-English Lexicon, bentuk adjektif Mimas/Mimans adalah Mimantean (kata namanya ialah Mimantis, Greek Μῑμάντις). Secara praktikalnya, peminjaman perkataan Inggeris seperti Mimasian dan Mimian kerap dilihat, tetapi selalunya penulis-penulis menggunakan frasa 'of Mimas'.

Ciri-ciri fizikal

Mimas' low density (1.17) indicates that it is composed mostly of water ice with only a small amount of rock. Due to the tidal forces acting on it, the moon is not perfectly spherical; its longest axis is about 10% longer than the shortest. The somewhat ovoid shape of Mimas is especially noticeable in recent images from the Cassini probe.

Mimas, imaged by Cassini, looking notably egg-shaped
Mimas, silhouetted against Saturn's northern latitudes
Fail:Mimas1.jpg
Mimas adalah satu bulan berdiameter 247 batu.

Mimas' most distinctive feature is a colossal impact crater 130 km across, named Herschel after the moon's discoverer. Herschel's diameter is almost a third of the moon's own diameter; its walls are approximately 5 km high, parts of its floor measure 10 km deep, and its central peak rises 6 km above the crater floor. If there were a crater of an equivalent scale on Earth it would be over 4,000 km in diameter, wider than Canada. The impact that made this crater must have nearly shattered Mimas: fractures can be seen on the opposite side of Mimas that may have been created by shock waves from the impact travelling through the moon's body.

The surface is saturated with smaller impact craters, but no others are anywhere near the size of Herschel. Although Mimas is heavily cratered, the cratering is not uniform. Most of the surface is covered with craters greater than 40 km in diameter, but in the south polar region, craters greater than 20 km are generally lacking. This suggests that some process removed the larger craters from these areas.

Scientists officially recognise two types of geological features on Mimas: craters and chasmata (chasms). See also: List of geological features on Mimas.

Mimas is responsible for clearing the material from the Cassini Division, the gap between Saturn's two widest rings, A Ring and B Ring.

Mimas dalam fiksyen dan filem

Mimas bears a striking resemblance to the Death Star, a space station in the movie Star Wars
  • Comparisons have been made between Mimas' appearance and the appearance of the Death Star from the movie Star Wars (see picture). The appearance is merely a coincidence, as Mimas was not photographed until three years after the release of the film; it was this similarity that led to Mimas sometimes being called "the Death Star moon".
  • In the novels of Rob Grant and Doug Naylor based on their sitcom Red Dwarf, Mimas is the site of a large, congested spaceport where Dave Lister takes shore leave to get over being dumped by his girlfriend Kristine Kochanski, adopts a cat, escapes as a stowaway and begins his journey on the Red Dwarf. Both the book and the series refer to the local delicacy "Mimean Bladderfish".
  • An episode of Star Trek: The Next Generation features Mimas as the site of an evacuation station to which four Starfleet cadets, including Wesley Crusher, transport after their vessels collide.
  • In the 1958 novel Lucky Starr and the Rings of Saturn (one of Isaac Asimov's famous Lucky Starr juvenile space opera series, which were originally published under the pseudonym of Paul French) the hero, knowing that Mimas is almost entirely made of ice, guides his ship on a collision course toward it, melts its surface with his weapons, and thus hides the ship underwater in order to escape from his enemies, the people from the Sirius System.


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