Even though scientific research is not their main goal, many amateur astronomers make a contribution to astronomy by monitoring variable stars, tracking asteroids and discovering transient objects, such as comets.

It has two main features on which its distinction as a major contribution to Avicennan studies may be said to rest: the first is its clarity and readability ; the second is the comparative approach adopted by the author [...].

The spin of the electrons in atoms is the main source of ferromagnetism, although there is also a contribution from the orbital angular momentum of the electron about the nucleus.

By 1900 Scotland had 3500 miles of railway ; their main economic contribution was moving supplies in and product out for heavy industry, especially coal-mining.

His contribution to the society was significant but short-lived: after collaborating with Withering on his Botanical Arrangement of British Plants the two quarrelled bitterly and Stokes severed his relations with the main Lunar members by 1788.

Despite the participation of these aircraft ( mainly from 1938 onward ), it was the venerable Junkers Ju 52 ( which soon became the backbone of the Transportgruppen ) that made the main contribution.

The main east-west walkway that runs from the research park through to the arts faculty buildings, was named Wally's Walk in recognition of Walter Abraham's contribution to the development of the university.

Climatology also receive a strong boost from the Russian school by Wladimir Köppen whose main contribution, climate classification, is still valid today.

Poulantzas ' main contribution to the Marxist literature on the state was the concept of ' relative autonomy ' of the state.

However, Suskin states in Show Tunes that " As the writing progressed and the extent of Bernstein's lyric contributions became less, the composer agreed to rescind his credit ... Contrary to rumor, Sondheim did not write music for the show ; his only contribution came on " Something's Coming ", where he developed the main strain of the chorus from music Bernstein wrote for the verse.

) His main contribution is the atomic theory, the belief that all matter is made up of various imperishable indivisible elements which he called atoms.

Its main eventual contribution to the war effort was to further concentrate material from the gaseous diffusion plants to even higher levels of purity.

Departments are administered by elected General Councils ( conseil général ) and their Presidents, whose main areas of responsibility include the management of a number of social and welfare allowances, of junior high school ( collège ) buildings and technical staff, of local roads and school and rural buses, and a contribution to municipal infrastructures.

His main contribution was to help Buñuel write the script for the film.

For example, a satellite antenna may not receive noise contribution from the earth in its main lobe, but sidelobes will contribute a portion of the 290K earth noise to its overall noise temperature.

The plan for a year of steady attrition on the Western Front, with the main effort in the summer being made by the British Expeditionary Force, was scrapped by Nivelle and the French government for a decisive battle, to be conducted in February by the French army, with the British army's contribution becoming a preliminary operation, the Battles of Arras.

In the manufacturing sector the main branches are foodstuff, beverage and tobacco with a contribution to the sector very close to the national average.

Its main technical contribution was a masterful analysis of the issues of elasticity, consumer surplus, increasing and diminishing returns, short and long terms, and marginal utility ; many of the ideas were original with Marshall, others were improved version of ideas by W. S. Jevons and others.

His main contribution was the germ plasm theory, according to which ( in a multicellular organism ) inheritance only takes place by means of the germ cells — the gametes such as egg cells and sperm cells.

In 1953 the Ilyushin Il-14 would make its first flight, and this version was equipped with much more powerful engines. The main contribution that the Soviets made in regards to airliners was the Antonov An-2.

The main contribution of the Aztec rule was a system of communications between the conquered cities.

Mach's main contribution to physics involved his description and photographs of spark shock-waves and then ballistic shock-waves.

Joseph A. Califano, Jr. has suggested that Great Society's main contribution to the environment was an extension of protections beyond those aimed at the conservation of untouched resources.

The four main stars that form the asterism are Alpha, Beta, Gamma, and Delta Crucis.

The main asterism in Delphinus is Job's Coffin, formed from the four brightest stars: Alpha, Beta, Gamma, and Delta Delphini.

Alpha Delphini, called Sualocin, is a blue-white hued main sequence star of magnitude 3. 8, 241 light-years from Earth.

* Antares ( Alpha Scorpii ) is a red supergiant star in a binary system with a hotter blue main sequence star Antares B. Antares B can therefore be termed a hot companion of the cool supergiant.

Although the first commercial sales were for VAX / VMS, from the mid-1980s the main Poplog development work was done on Sun SPARC computers running Solaris, although several different versions were sold, including versions for HP-UX and a 64-bit version of Poplog for DEC Alpha running Digital UNIX.

With the three main Alpha Quadrant forces fighting against them the Dominion was forced back, with the Alliance even seizing the Cardassian planet of Chin ' toka.

* Alpha AI / Leonard L. Church, a main character of the Red vs Blue Series

The main antagonist of Amy's story is E-100 Alpha ( better known as Zero ), the first E-100 series robot who is a large green robot and is considered the prototype.

The brightest star, Alpha Circini, is a main sequence star of spectral class A7 and apparent visual magnitude 3. 19.

Motherwell FC were born on 27 May 1886, when representatives of the two main Motherwell works teams, Glencairn and Alpha FC met in Ballie's pub in Parkneuk, and decided to merge the two teams, with the aim of creating a club to represent the town as a whole at a higher footballing level.

In the foreground is " Destination Alpha ", one of the two main entrances.

* Alpha Centauri is a triple star composed of a main binary yellow dwarf pair ( Alpha Centauri A and Alpha Centauri B ), and an outlying red dwarf, Proxima Centauri.

Alpha 1-antitrypsin is the main protein of the alpha-globulin 1 region.

The session themes are the same as the main Alpha Course, and the " Holy Spirit " away day / weekend, small groups discussions and shared food are also present.

The Alpha course has been endorsed by a number of leaders, including many Roman Catholic cardinals, Anglican archbishops and bishops, and leading figures of all the main Christian denominations.

Alpha TV moved their main evening news from 20: 00 to 19: 00 in 2009 so no longer compete to be number one in this time slot.

* 2010: In the video game Alpha Protocol, the main character Mike Thornton is referred to as " gweilo " by the Chinese triad leader Hong Shi

Earth's Alpha site serves as a main site of operation for the Rebel Jaffa and later the Tok ' ra, but the two races have difficulty with trust and collaboration in defeating the Goa ' uld as their enemy.

The main Alpha Centauri star and Proxima Centauri stand in about the same relationship as the Earth and the Moon, and both pairs might be described as one-hung-low.

Alpha served as the main antagonist of the series ' first season, with guest appearances in the show's second season.

One thirty inch ( 0. 762 m ) diameter main oil pipeline ran 128 miles ( 206 kilometres ) from Piper Alpha to Flotta, with a short oil pipeline from the Claymore platform joining it some twenty miles ( 32 km ) to the west.