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 main contribution of Alpha to the microprocessor industry, and the main reason for its performance, was not so much the architecture but rather its implementation.

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.

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 town was about what Wilson expected: one main street with its rows of false-fronted buildings, a water tower, a few warehouses, a single hotel ; ;

That was the day that he had practically mopped up the main street of Big Sands with Aaron McBride, field boss for the Highlands Oil & Gas Company.

Fleischman with eight was to patrol the Leyte Gulf area, with his main task to get any kamikaze before they got to the ships.

Jean Bodin, writing in the sixteenth century, may have been the seminal thinker, but it was the vastly influential John Austin who set out the main lines of the concept as now understood.

He was ghost writer for Babe Ruth, whose main talent for literary composition was the signing of his autograph.

And it was his main present!!

The half-intensity diameter of the antenna beam was about 9', and the angle subtended by the moon included the entire main beam and part of the first side lobes.

The half-intensity diameter of the main lobe of the antenna was about 18'.5, and the brightness temperature was reduced by assuming a Gaussian shape for the antenna beam and a uniformly bright disk for the moon.

The issue was acute because the exiled Polish Government in London, supported in the main by Britain, was still competing with the new Lublin Government formed behind the Red Army.

But to return to the main line of our inquiry, it is doubtful that Utopia is still widely read because More was medieval or even because he was a martyr -- indeed, it is likely that these days many who read Utopia with interest do not even know that its author was a martyr.

The editor's main criticism of the trial was the haste with which it was conducted.

Like a wise gardener, Hardy pruned away the Shakespearian sonnets and songs, and the elements of meter and poetic diction to which his personal style was not suited, and let the main stock of his talent flourish.

Vermont's main railroad line was prostrate.

Because of this diversionary attack the main group that had been pinned down on the hill was able to surge forward again.

Since then he had worked at this and that, though some said his main interest was gambling.

At present the doctor's main concern was in seeing to it that Japanese salvage firms were not permitted to operate on the hulks of warships sunk too close inshore, because the work involved setting off nerve-shattering blasts at all hours.

He'd have to think, but the main thing, the imperative necessity, was to leave before Sam Bentley was up and about, and before Millie detained him with sympathy.

The damage caused by Sherman's March to the Sea through Georgia in 1864 was limited to a swath, but neither Lincoln nor his commanders saw destruction as the main goal, but rather defeat of the Confederate armies.