Mach is a large lunar crater of the class known as a walled plain. It is located on the far side of the Moon and cannot be viewed directly from the Earth. Nearby craters of note include Joule to the northeast, Mitra attached to the western outer rim, and Henyey to the southwest.
This is a prominent but eroded formation with multiple craters along the rim and interior. The crater Harvey breaks across the eastern rim, and its outer rampart spills across the interior floor of Mach. The overall shape of Mach resembles a pear, with a prominent outward bulge to the northeast. Such a bulge can be caused by a second, merged crater. The northern edge is also the most worn and overlain by impacts.
The interior of Mach is marked by several small craters, particularly in the northeastern bulge. Several craters also lie along the edges to the west and northwest. The remainder of the interior floor is relatively level, when compared to the terrain that surrounds Mach. There is a formation of central ridges near the midpoint of the crater that create a large number of unexplained magnetic anomalies. (Or at least the center if the northeastern bulge is disregarded.)
Crater may refer to:
In landforms:
Other:
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.
Coordinates: 11h 36m 16.5s, −10° 52′ 37.1″
Laevens 1 is a faint globular cluster in the constellation Crater that was discovered in 2014. It is also known as Crater, the Crater cluster and PSO J174.0675-10.8774.
At a distance of 145 kiloparsecs (470 kly) it is the most distant Milky Way globular cluster yet known, located in the galactic halo surrounding the Milky way galaxy. With an age of only 7.5 Gyr, it is likely to have been incorporated into our galaxy long after when the Milky way was formed, probably during an interaction with the Small Magellanic Cloud
An alternative analysis categorizes it as a satellite galaxy.
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Maché is a commune in the Vendée department in the Pays de la Loire region in western France.
See also
References
Mach (/mʌk/) is a kernel developed at Carnegie Mellon University to support operating system research, primarily distributed and parallel computing. Mach is often mentioned as one of the earliest examples of a microkernel. However, not all versions of Mach are microkernels. Mach's derivatives are the basis of the modern operating system kernels in GNU Hurd and Apple's products OS X, iOS, tvOS and watchOS.
The project at Carnegie Mellon ran from 1985 to 1994, ending with Mach 3.0, which is a true microkernel. Mach was developed as a replacement for the kernel in the BSD version of Unix, so no new operating system would have to be designed around it. Experimental research on Mach appears to have ended, although Mach and its derivatives exist within a number of commercial operating systems. These include NeXTSTEP and OpenStep, upon which OS X is based—all using the XNU operating system kernel which incorporates an earlier, non-microkernel, Mach as a major component. The Mach virtual memory management system was also adopted in 4.4BSD by the BSD developers at CSRG, and appears in modern BSD-derived Unix systems, such as FreeBSD.
In Greek mythology, the Makhai or Machai, Machae (Greek: Μάχαι, "battles"; singular: Μάχη Machê or Makhê) were the daemons (spirits) of battle and combat, and were sons or daughters of Eris, siblings to other vicious personifications like the Hysminai, the Androktasiai, and the Phonoi.
Mythology
The daemons Homados (Battle-Noise), Alala (War-Cry), Proioxis (Onrush), Palioxis (Backrush) and Kydoimos (Confusion) were closely associated with the Makhai.
They were accompanied in battlefields by other deities and spirits associated with war and death, such as Ares, Phobos, Deimos, the Keres, Polemos, Enyo, and their mother Eris.