Hahn (crater)

Hahn is a lunar impact crater that is located near the northeastern limb of the Moon. The crater appears oval when viewed from the Earth due to foreshortening. It is located less than one crater diameter to the southeast of Berosus, a slightly smaller formation.

The inner wall of Hahn contains a system of terraces, particularly in the southern half. A smaller crater lies across the northwest rim, forming a break that reaches the interior floor. The interior floor has a region of lower albedo in the northern half, making it darker in appearance than the southern section of the floor. At the midpoint of the interior is an elongated central ridge, with the longer extent oriented north–south. The floor is also marked by several tiny craterlets.

Satellite craters

By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Hahn.

References

Hahn

Hahn may refer to:

Places

Businesses

Other uses

See also

Taunusstein

Taunusstein is the biggest town in the Rheingau-Taunus-Kreis in the Regierungsbezirk of Darmstadt in Hesse, Germany. It consists of more than 29,000 inhabitants.

Geography

Location

Taunusstein lies roughly 10 km northwest of Wiesbaden and about 10 km west of Idstein and the Autobahn A 3. It is part of the Untertaunus (lower Taunus) range.

Taunusstein itself is a rural area and is about 30 km from the river Rhine. The lowest point in Taunusstein is 310 m above sea level, and the highest 613.9 m.

Neighbouring communities

Taunusstein borders in the north on the communities of Hohenstein and Hünstetten and the town of Idstein, in the east on the community of Niedernhausen, in the south on the district-free city of Wiesbaden and in the west on the community of Schlangenbad and the town of Bad Schwalbach.

Constituent communities

Taunusstein is made up of ten Stadtteile:

History

The town of Taunusstein came into being on 1 October 1971 through the merger of the formerly self-governing communities of Bleidenstadt, Hahn, Neuhof, Seitzenhahn, Watzhahn and Wehen, whereupon Taunusstein was also given town rights. On 1 July 1972, the communities of Hambach, Niederlibbach, Orlen and Wingsbach were amalgamated into the town of Taunusstein.

Hahn, Rhineland-Palatinate

Hahn is an Ortsgemeinde – a municipality belonging to a Verbandsgemeinde, a kind of collective municipality – in the Rhein-Hunsrück-Kreis (district) in Rhineland-Palatinate, Germany. It belongs to the Verbandsgemeinde of Kirchberg, whose seat is in the like-named town. The name Hahn is well known as being the name shared with Frankfurt-Hahn Airport, which arose after 1993 from the United States Air Force’s Hahn Air Base once the Americans had withdrawn.

Geography

Location

The municipality lies on a ridge in the part of the Hunsrück facing the Moselle on the watershed between the Nahe and the Moselle, and also on the Hunsrückhöhenstraße (“Hunsrück Heights Road”, a scenic road across the Hunsrück built originally as a military road on Hermann Göring’s orders). The Wilwersbach rises in Hahn.

History

Within Hahn’s municipal limits are traces of Roman and Frankish settlement. The placename Hahn, originally written Hagene (1120), and later also Haan, Han, Hane, and Hain, originally meant, according to the Rhenish toponym researcher Heinrich Dittmaier, “wattled fence”, then later “enclosed dwelling place”. In 1120, Hagene had its first documentary mention in connection with Lötzbeuren, Pünderich and Karden in a donation document made out to Mettlach Abbey. It was mentioned a second time about 1330 or 1335 in the Sponheim taxation register. Beginning in 1794, Hahn lay under French rule. In 1815 it was assigned to the Kingdom of Prussia at the Congress of Vienna. Since 1946, it has been part of the then newly founded state of Rhineland-Palatinate. After the Second World War, an air base was built on parts of the municipal area. This was converted for civil aviation in 1993 after the United States Air Force withdrew from the base. It is now called Frankfurt-Hahn Airport (or Flughafen Frankfurt-Hahn in German).

Crater

Crater may refer to:

In landforms:

Other:

Crater (Aden)

Crater (/ˈkreɪtər/; Arabic: كريتر‎, [ˈkɾeːtəɾ]), also Kraytar, is a district of the Aden Governorate, Yemen. Its official name is Seera (Arabic: صيرة Ṣīrah). It is situated in a crater of an ancient volcano which forms the Shamsan Mountains. In 1991, the population was 70,319. As of 2003, the district had a population of 76,723 people.

In the closing days of British rule in 1967, Crater District became the focus of the Aden Emergency, sometimes called the last imperial war. After a mutiny of hundreds of soldiers in the South Arabian Federation Army on 20 June, all British forces withdrew from the Crater. The Crater was occupied by Arab fighters while British forces blocked off its two main entrances. In July, a British infantry battalion, led by Lt. Col. Colin Mitchell of the Argyll & Sutherland Highlanders, entered the Crater and managed to occupy the entire district overnight with no casualties. Nevertheless, deadly guerrilla attacks soon resumed, with the British leaving Aden by the end of November 1967, earlier than had been planned by British Prime Minister Harold Wilson and without an agreement on the succeeding governance.

Crater (constellation)

Crater is a constellation. Its name is Latin for cup, and in Greek mythology it is identified with the cup of the god Apollo. It was one of the 48 constellations listed by the 2nd century astronomer Ptolemy, and remains one of the 88 modern constellations. It is faint, with no star brighter than third magnitude.

Notable features

Stars

Alpha Crateris, traditionally called Alkes, is an orange-hued giant star of magnitude 4.1, 174 light-years from Earth. Its traditional name means "the cup". Beta Crateris is a blue-white hued star of magnitude 4.5, 266 light-years from Earth. Gamma Crateris is a double star divisible in small amateur telescopes. The primary is a white star of magnitude 4.1, 84 light-years from Earth. The secondary is of magnitude 9.6. Delta Crateris is the brightest star in Crater at magnitude 3.6. 195 light-years away, it is an orange-hued giant star.

R Crateris is a semi-regular variable of type SRb and a spectral classification of M7. It has a magnitude of 9.8-11.2 and an optical period of 160 days.